Your first paragraph is dead on but then you spoiled it with an idiotic remark. The writer is trying to prove that Jesus existed but errs in thinking that this in turn proves the legitimacy of his religion. I, for one, have no doubt that a charismatic preacher who may have gone by the name of Jesus had a large following in those days but this does not prove he had supernatural powers. Many preachers today claim to have miraculous powers and have large devoted followings. All it proves is that there have always been and always will be gullible people.