He would have had successors, his Omars and Alis, just like Mo. So far as I can tell, Nazism and Islam are virtually identical in etiology.
Sure, the ones who designed the spectacles would have continued, but when the moment of the mesmerizing 3-hour speech came, it would have been lame. Besides that, after 50 years the Reich would have lost its sparkle and gleam anyway when economic reality bit them just like it bit the USSR. The Reich had everything, provided all answers, but it lacked the one thing: God. It was doomed.