I read in the book Battle for God (which chronicles the extremist factions of the big 3 religions over the years) that many theologians (hard to word to spell, and I think I got it wrong) believe that some parts of the Jesus story were lifted from the Moses story to make him more acceptable as the "chosen one" to Jews. The main thing was the whole "kill the first born baby" part of the story which is almost identical to the Moses story.
