I'm not concerned with marginalization, since I'm not running for office. I already realized that Fidel Castro would not receive very high approval ratings in Amerikkka. IMHO, marginalization has little if anything to do with authenticity or the supposed lack thereof.
It was interesting to me that you equated the posthumous "success" of Jesus with his supposed authenticity. In my probably not so marginal POV, Jesus was a product sold to a gullible public by a bunch of unscrupulous con men, whose successors are still flogging him today for all he's worth. If that's your version of "authenticity," you're certainly welcome to it. Kinda reminds me of Seinfeld looking out from the screen at his audience and saying earnestly and sincerely, "We're real people. Real television people." It was funny with Seinfeld and it's funnier still with Jesus - - the hoax is that much bigger.
IMHO, one of the most authentic figures of all the group mentioned in this thread is the Buddha - - not that I'd pretend to know the real facts of his life from his legend, but only because of the straightforwardness and seamless integrity of his message. Whatever the original Jesus message might have been, it's been packaged and re-packaged into senseless and self-contradictory gibberish, a pabulum for the lowest common denominator. Fidel and Che are authentic too, but in a narrower sense of the word.