Understandable. (Err... well, as close as Hitler's motivations and thought process gets, anyway.
)
In any case, I suppose ATL World War II would be quite different than OTL. Even assuming comparable military technology (as well as tactical and operational doctrine), Trotskyist Russia will almost certainly fund Marxist terrorism and the armed wings of communist parties throughout Europe, which may create something of an insurgency or civil war in every major European nation backed by Soviet revolutionary largesse. Simultaneously, I'm guessing the Red Army will roll into Eastern and Central Europe to "assist their comrades" in Poland and Finland, as well as Germany and its neighbors thereafter (even if Hitler and the Nazis still wind up in charge). All in all, lots of border-gore via a weird mash-up of "nation-versus-nation" conflict and civil wars between communist and non-left factions across mainland Europe, though the Asian theater (which will be preoccupied with problems of its own) is another story.