Well, I think there is proof that Jesus existed, but I'm not too sure about it. In any case, he probably didn't lead the life that's written down in the Gospels. Believe me when I say that many other, ancient, religious figures lead an almost identical life to Jesus' in the Gospels. That's the whole point of this topic. 'Jesus' has existed for thousands of years, under many different names, but the gist of the story is always the same.