I've always thought it interesting, without making any judgment on it either way, that million worship and adore a man who apparently only a few hundred people might have seen, a few people wrote about, and only one or two actual historians hinted might exist.
I mean, either Christianity started out so small and localized that no one gave a damn about it enough to write it up, or Jesus was just pretty much made up out of folk stories containing a lot of speculation about the nature of the expected Messiah or a compilation of several individuals who were teaching a radical form of Judaism at the time.
I think if Jesus hadn't been written about then, we'd have invented him sooner or later. The Messiah is our ultimate hero myth, and god knows we need our heroes.
I can actually appreciate Christ and his teachings as present without really having to believe he existed as written, which is one of the nice things about being a universalist. I don't have to believe what is unproven to get benefit out of it. Believing in what Christ taught isn't that hard, living it is, but believing that peace is good, brotherhood is good, don't be a hypocrite, love one another...all good.