http://www.infidels.org/library/modern/paul_carlson/nt_contradictions.html
I. THE BIRTH OF JESUS
A. THE GENEALOGIES OF JOSEPH
1. Matthew and Luke disagree
Matthew and Luke give two contradictory genealogies for Joseph (Matthew 1:2-17 and Luke 3:23-38). They cannot even agree on who the father of Joseph was. Church apologists try to eliminate this discrepancy by suggesting that the genealogy in Luke is actually Mary's, even though Luke says explicitly that it is Joseph's genealogy (Luke 3:23). Christians have had problems reconciling the two genealogies since at least the early fourth century. It was then that Eusebius, a "Church Father," wrote in his The History of the Church, "each believer has been only too eager to dilate at length on these passages."
2. Why genealogies of Joseph?
Both the genealogies of Matthew and Luke show that Joseph was a direct descendant of King David. But if Joseph is not Jesus' father, then Joseph's genealogies are meaningless as far as Jesus is concerned, and one has to wonder why Matthew and Luke included them in their gospels. The answer, of course, is that the genealogies originally said that Jesus was the son of Joseph and thus Jesus fulfilled the messianic requirement of being a direct descendant of King David.
Long after Matthew and Luke wrote the genealogies the church invented (or more likely borrowed from the mystery religions) the doctrine of the virgin birth. Although the virgin birth could be accommodated by inserting a few words into the genealogies to break the physical link between Joseph and Jesus, those same insertions also broke the physical link between David and Jesus.
The church had now created two major problems: 1) to explain away the existence of two genealogies of Joseph, now rendered meaningless, and 2) to explain how Jesus was a descendant of David.
The apostle Paul says that Jesus "was born of the seed of David" (Romans 1:3). Here the word "seed" is literally in the Greek "sperma." This same Greek word is translated in other verses as "descendant(s)" or "offspring." The point is that the Messiah had to be a physical descendant of King David through the male line. That Jesus had to be a physical descendant of David means that even if Joseph had legally adopted Jesus (as some apologists have suggested), Jesus would still not qualify as Messiah if he had been born of a virgin - seed from the line of David was required.
Women did not count in reckoning descent for the simple reason that it was then believed that the complete human was present in the man's sperm (the woman's egg being discovered in 1827). The woman's womb was just the soil in which the seed was planted. Just as there was barren soil that could not produce crops, so also the Bible speaks of barren wombs that could not produce children.
This is the reason that although there are many male genealogies in the Bible, there are no female genealogies. This also eliminates the possibility put forward by some apologists that Jesus could be of the "seed of David" through Mary.
3. Why do only Matthew and Luke know of the virgin birth?
Of all the writers of the New Testament, only Matthew and Luke mention the virgin birth. Had something as miraculous as the virgin birth actually occurred, one would expect that Mark and John would have at least mentioned it in their efforts to convince the world that Jesus was who they were claiming him to be.
The apostle Paul never mentions the virgin birth, even though it would have strengthened his arguments in several places. Instead, where Paul does refer to Jesus' birth, he says that Jesus "was born of the seed of David" (Romans 1:3) and was "born of a woman," not a virgin (Galatians 4:4).
4. Why did Matthew include four women in Joseph's genealogy?
Matthew mentions four women in the Joseph's genealogy.
a. Tamar - disguised herself as a harlot to seduce Judah, her father-in-law (Genesis 38:12-19).
b. Rahab - was a harlot who lived in the city of Jericho in Canaan (Joshua 2:1).
c. Ruth - at her mother-in-law Naomi's request, she came secretly to where Boaz was sleeping and spent the night with him. Later Ruth and Boaz were married (Ruth 3:1-14).
d. Bathsheba - became pregnant by King David while she was still married to Uriah (2 Samuel 11:2-5).
To have women mentioned in a genealogy is very unusual. That all four of the women mentioned are guilty of some sort of sexual impropriety cannot be a coincidence. Why would Matthew mention these, and only these, women? The only reason that makes any sense is that Joseph, rather than the Holy Spirit, impregnated Mary prior to their getting married, and that this was known by others who argued that because of this Jesus could not be the Messiah. By mentioning these women in the genealogy Matthew is in effect saying, "The Messiah, who must be a descendant of King David, will have at least four "loose women" in his genealogy, so what difference does one more make?"
B. THE ANGEL'S MESSAGE
In Matthew, the angel appears to Joseph in a dream and tells him that Mary's child will save his people from their sins. In Luke, the angel tells Mary that her son will be great, he will be called the Son of the Most High and will rule on David's throne forever. A short time later Mary tells Elizabeth that all generations will consider her (Mary) blessed because of the child that will be born to her.
If this were true, Mary and Joseph should have had the highest regard for their son. Instead, we read in Mark 3:20-21 that Jesus' family tried to take custody of him because they thought he had lost his mind. And later, in Mark 6:4-6 Jesus complained that he received no honor among his own relatives and his own household.
C. THE DATE
According to Matthew, Jesus was born during the reign of Herod the Great (Matthew 2:1). According to Luke, Jesus was born during the first census in Israel, while Quirinius was governor of Syria (Luke 2:2). This is impossible because Herod died in March of 4 BC and the census took place in 6 and 7 AD, about 10 years after Herod's death.
Some Christians try to manipulate the text to mean this was the first census while Quirinius was governor and that the first census of Israel recorded by historians took place later. However, the literal meaning is "this was the first census taken, while Quirinius was governor ..." In any event, Quirinius did not become governor of Syria until well after Herod's death.
D. THE PLACE
Both Matthew and Luke say that Jesus was born in Bethlehem. Matthew quotes Micah 5:2 to show that this was in fulfillment of prophecy. Actually, Matthew misquotes Micah (compare Micah 5:2 to Matthew 2:6). Although this misquote is rather insignificant, Matthew's poor understanding of Hebrew will have great significance later in his gospel.
Luke has Mary and Joseph travelling from their home in Nazareth in Galilee to Bethlehem in Judea for the birth of Jesus (Luke 2:4). Matthew, in contradiction to Luke, says that it was only after the birth of Jesus that Mary and Joseph resided in Nazareth, and then only because they were afraid to return to Judea (Matthew 2:21-23).
In order to have Jesus born in Bethlehem, Luke says that everyone had to go to the city of their birth to register for the census. This is absurd, and would have caused a bureaucratic nightmare. The purpose of the Roman census was for taxation, and the Romans were interested in where the people lived and worked, not where they were born (which they could have found out by simply asking rather than causing thousands of people to travel).
E. THE PROPHECIES
Matthew says that the birth of Jesus and the events following it fulfilled several Old Testament prophecies. These prophecies include:
1. The virgin birth (Isaiah 7:14)
This verse is part of a prophecy that Isaiah relates to King Ahaz regarding the fate of the two kings threatening Judah at that time and the fate of Judah itself. In the original Hebrew, the verse says that a "young woman" will give birth, not a "virgin" which is an entirely different Hebrew word. The young woman became a virgin only when the Hebrew word was mistranslated into Greek.
This passage obviously has nothing to do with Jesus (who, if this prophecy did apply to him, should have been named Immanuel instead of Jesus).
2. The "slaughter of the innocents" (Jeremiah 31:15)
Matthew says that Herod, in an attempt to kill the newborn Messiah, had all the male children two years old and under put to death in Bethlehem and its environs, and that this was in fulfillment of prophecy.
This is a pure invention on Matthew's part. Herod was guilty of many monstrous crimes, including the murder of several members of his own family. However, ancient historians such as Josephus, who delighted in listing Herod's crimes, do not mention what would have been Herod's greatest crime by far. It simply didn't happen.
The context of Jeremiah 31:15 makes it clear that the weeping is for the Israelites about to be taken into exile in Babylon, and has nothing to do with slaughtered children hundreds of years later.
3. Called out of Egypt (Hosea 11:1)
Matthew has Mary, Joseph and Jesus fleeing to Egypt to escape Herod, and says that the return of Jesus from Egypt was in fulfillment of prophecy (Matthew 2:15). However, Matthew quotes only the second half of Hosea 11:1. The first half of the verse makes it very clear that the verse refers to God calling the Israelites out of Egypt in the exodus led by Moses, and has nothing to do with Jesus.
As further proof that the slaughter of the innocents and the flight into Egypt never happened, one need only compare the Matthew and Luke accounts of what happened between the time of Jesus' birth and the family's arrival in Nazareth. According to Luke, forty days (the purification period) after Jesus was born, his parents brought him to the temple, made the prescribed sacrifice, and returned to Nazareth. Into this same time period Matthew somehow manages to squeeze: the visit of the Magi to Herod, the slaughter of the innocents and the flight into Egypt, the sojourn in Egypt, and the return from Egypt. All of this action must occur in the forty day period because Matthew has the Magi visit Jesus in Bethlehem before the slaughter of the innocents.
F. THE TRUTH BEHIND THE PROPHECIES - MATTHEW'S BIG BLUNDER
Since the prophecies mentioned above do not, in their original context, refer to Jesus, why did Matthew include them in his gospel? There are two possibilities:
1. The church says that the words had a hidden future context as well as the original context, ie, God was keeping very important secrets from His chosen people.
2. Matthew, in his zeal to prove that Jesus was the Messiah, searched the Old Testament for passages (sometimes just phrases) that could be construed as messianic prophecies and then created or modified events in Jesus' life to fulfill those "prophecies."
Fortunately for those who really want to know the truth, Matthew made a colossal blunder later in his gospel which leaves no doubt at all as to which of the above possibilities is true. His blunder involves what is known as Jesus' triumphant entry into Jerusalem riding on a donkey (if you believe Mark, Luke or John) or riding on two donkeys (if you believe Matthew). In Matthew 21:1-7, two animals are mentioned in three of the verses, so this cannot be explained away as a copying error. And Matthew has Jesus riding on both animals at the same time, for verse 7 literally says, "on them he sat."
Why does Matthew have Jesus riding on two donkeys at the same time? Because he misread Zechariah 9:9 which reads in part, "mounted on a donkey, and on a colt, the foal of a donkey."
Anyone familiar with Old Testament Hebrew would know that the word translated "and" in this passage does not indicate another animal but is used in the sense of "even" (which is used in many translations) for emphasis. The Old Testament often uses parallel phrases which refer to the same thing for emphasis, but Matthew was evidently not familiar with this usage. Although the result is rather humorous, it is also very revealing. It demonstrates conclusively that Matthew created events in Jesus' life to fulfill Old Testament prophecies, even if it meant creating an absurd event. Matthew's gospel is full of fulfilled prophecies. Working the way Matthew did, and believing as the church does in "future contexts," any phrase in the Bible could be turned into a fulfilled prophecy!
G. CONCLUSIONS REACHED SO FAR
From looking at just the birth accounts several conclusions can be reached, all of which will be further reinforced by examining other parts of the New Testament:
1. The gospel writers contradict each other.
2. The gospel writers rewrote history when it suited their purposes.
3. The gospels were extensively edited to accommodate the evolving dogma of the church.
4. The gospel writers misused the Old Testament to provide prophecies for Jesus to fulfill.
From the birth accounts alone, it is obvious that in no way can the New Testament be considered "the inerrant Word of God," or even "the Word of God, inerrant regarding matters important to faith and practice."