Had not the Germans been subject to the imperious Versaille Treaty, Hitler and his NSDAP would not have had such a fertile petri dish to grow in. Nor would the mini Bolsheviks and assorted German Communist groups had an “in” to infect the national fabric.
Sorry pal, but that's just propaganda, the real truth of the matter is totally clear if you simply imagine Adolf Hitler for what he figuratively was: Eric Ludendorf's son.
Watch the video -- Ludendorf joined Hitler's party and marched beside him in his 1923 Putsch.
Hitler's WWII military policy was simply to achieve what Ludendorf tried & failed in WWI.
So, if German victory in 1918 would prevent the rise of Hitler, it's only because Hitler would have been unnecessary -- small consolation to the millions enslaved in Eastern Europe.l