I think there is some evidence that Jesus really lived. I do not say gods son or other bla bla. I think that lot of the legends in the case of Jesus have some truth in them. Distorted because of time difference between the events and when it wsa put in writing.
That somebody claimed to be a mesiah is not that strange. It still happens a lot of times in these days.
There is a lot of similarity in stories in the bible. More with the babylonian text then with the greek actually. The babylonain text are older then the bible and can be a common source for both.
It also seems that people create the same kind of stories independantly sometimes. People use to project human things on the gods. The big diffference in the bible is the use of a single almighty god. This is not so difficult to explain in a culture dominted with shepards of sheep.
Danny