The funny thing is this. The Gospels were written after Jesus was killed. The earliest being about 30 to 40 years after by members of the beginning church. How do this people know what Jesus did or said verbatem after 30 to 40 years. How accurate can it be? The culture in which Christianity sprung from where not one focused on oral historical accuracy like Native American cultures. I think that with each telling there was a bit of embelishment made. You know, like those Paul Bunyan tales.
Also you call him the Son of God, but that was arbitrarily assigned to him by the Council of Chalcedon (msp?) about 412 C.E. As well as his birthday being December 25th. Frankly if you take all the major Christian holidays you will find them happening about the same time of major pagan holidays. Christmas? Winter Solstice. Easter? Spring Solstice (or is it Equinox).
These are HUMAN inventions, not because of some god. That is why I came to the conclusion that Christianity is a sham religion, but that is just me. There is no God. Just because we don't know how the universe began doesn't mean some god had a hand in it.