cofty: How can we be sure Jesus even existed?
Question: How can we be sure Jesus even existed?
Answer: How can we know Mohammed existed?
Non-rhetorical answer: Religious groups like this are always founded by a charismatic leader who's adept at drawing a crowd of followers. I doubt that a dozen men of lesser imagination could get together and say to each other, "Let's invent a Messiah!" and actually pull it through.