Well Nostradamus can well be just an example of one person's unique dreams, or "prophecies". It may just be pure coincidence in my opinion for the Holocaust situation. It depends on the person's view on someone. As for The Mayans, although they are surprisingly advanced, not even today can we predict an end to our system so precisely. The Mayans took a lot of items symbolically, I think 12/21/12 is, as it is, just an end to a very precise calendar.