Several reasons why I don't believe in an historical Jesus
1. Considering how great he was supposed to have been there is no known image of Jesus that was made during his lifetime, no drawings, paintings, nor busts etc. the earliest known image of Jesus is a fresco of the healing of the paralytic at Dura-Europos (c.230-40) Images of Christ
2. Considering the importance of his mission and message to the world Jesus never wrote down a single word about it. The gospel of John says that he on one occasion wrote with his finger on the ground, what did he write? Nobody knows nor cared to take note of it I guess it must not have been important. John 8:6 'This they said, tempting him, that they might have to accuse him. But Jesus stooped down, and with his finger wrote on the ground, as though he heard them not.'
3. The fact that none of the many historians that lived during Christ's alleged lifetime and some even were present around the region where he is said to have walked and preached never bothered to utter a single word regarding Christ. http://www.holysmoke.org/sdhok/jesus5.htm
4. The so called holy sites are all symbolic the church does not even know where the alleged tomb of Christ is located nor the actual location of the crucifixion.
5. There are no surviving relics that belonged to Jesus, not even a damn sandal! http://en.wikipedia.org/wiki/Relics_associated_with_Jesus
6. The earliest of the synoptic gospels (Mark) is dated at circa 70 A.D. approximately 40 years after the alleged death of Jesus. I think that given the amount of time between the alleged death of Jesus and the aging of the author (Mark) that his memory may be compromised as to what actually occurred. I know from experience that sometimes our memories tend to fail us or even exaggerate a past event when we try to describe it in detail.
7. There are also many similarities between the Christ myth and that of other ancient myths in the region that predated Christianity. The N.T. in my opinion just borrowed many of the ancient so called prophetic sayings of the O.T. and built their story as the fulfillment of those prophecies around a fictional deity; namely, Christ. Some christians argue that if Christ did not exist how can we account for the rise of Christianity etc. But many religions that predated Christianity arose based on fictional characters or deities so that argument fails to support the existence of Christ. In fact some scholars have gone on to say that the real founder of Christianity was Saul/Paul of Tarsus.
8. Relative to my first reason have you ever noticed that any religious person who claims to have seen Jesus, Buddha, the virgin Mary happen to see them exactly as they had imagined them based on what they have been taught that their deity of choice looks like? This indicates to me that these so called revelations and supernatural experiences are rather a psycho-emotional experience instead. Even if those experiences appear to be life changing for the individual who claims to have experienced them.
9. The gospels don't seem to agree as to certain key events that happened during Christ's alleged death, burial, and resurrection. Let's take a quick look as to what the synoptic gospels say about the death of Jesus and what occurred. Comparing Matthew 27:45,51-53 Mark 15:38 and Luke 23:44 we will see huge inconsistencies. They all agree that the temple veil was split in two right down the middle upon Jesus death except that in Luke's version this happened immediately before Jesus uttered his last words and expired. Matthew and Luke must have been high on mushrooms when they wrote that there was a solar eclipse that lasted approximately from the sixth hour to the ninth hour. Generally a solar eclipse from start to finish would last a couple of hours but when the moon obscures the sun completely this only lasts a couple of minutes. http://curious.astro.cornell.edu/question.php?number=318 Matthew is the only one of the authors who takes it one step further by adding an earthquake and many accompanying resurrections of the dead who were supposedly seen in the holy city by many. Yet no one who saw any of this was shocked or curious enough to want to write it down outside of the biblical authors whose gospels were originally presented as anonymous works till at least the middle of the 2nd century.