Er, I'm not emotionally tied to the idea that Jesus possibly didn't exist. Were there proof of his existence it wouldn't trouble me at all, though it would certainly throw into sharper focus the pack of lies peddled about his alleged miraculous doings. And, er again, he was put to death, so the story goes, by Rome, so he did matter. In fact, as I understand it the putting to death of a Jewish rebel by Rome around that time has one of the stronger claims to veracity.