Not to mention that Germany would have the Bomb, since without Hitler's rampant anti-Semitism, German scientists like Einstein would gladly help a non-Nazi authoritarian German Empire.
Perhaps, but I've read that Einstein, in particular, was enough of a general pacifist that he would not be all that glad to help any authoritarian German Empire (or any other nation fighting a war) get the bomb. I think it was the particular spectre of the Nazis that led hm to write the famous letter to Roosevelt regarding the bomb.