No its not. Someone would of ended killing hitler and stalin. While they where very popular with a large part of their propogandized soceity, they where also very unpopular with a small portions of the same society. Especially with the planned death camps in the East, someone would eventually managed to kill hitler.
Have you been listening to Judeo-Bolshevik propoganda?
Everyone knows that was just a Soviet rumour designed to hurt the Reich's standing among the world.
I do wonder what would have happened if Himmler hadn't been travelling with Hitler in the car that fateful day. I doubt that Himmler would have liked seeing Goering take over Germany (even if he was Hitler's successor), and I highly doubt he would have approved of Hess' much more moderate regime.
I highly doubt we'd see Zion as strong as it is today. Hitler originally planned for the Jews to be moved to Madagascar, but it was Goering who made it happen. Hess and later Speer gradually removed the restrictions on the Jewish state, with Hess eliminating the constant SS presence and Speer allowing the state independence as "Zion" and recalling all Gestapo from the island. However, I think the Jews were fairly happy that the Heer retained some presence on the island to help combat the native guerrillas. Though most were deported to continental Africa, the few that remain and see the Jews as "invaders" do provide quite a threat to stability on the island. I don't know if the ZDF could deal with the problem on their own, especially in the early days.
I wonder what would happen if Communism weren't banned on Zion though. Do you think that the USSR would have allied with the Jewish state, rather than the Jews retaining a strong relationship with the Reich?