It's been known since during the war itself that the German heer (armed forces) were involved in atrocities, not just the SS, so how did we in the West get the notion that their hands were relatively "clean?" Did it develop more or less organically since there were a relative handful of atrocities in the West as compared to the East (and maybe a lingering view of Eastern Europe as barbaric and Asiatic) or was it a successful whitewashing campaign by the Western Allies who after all wanted a new Germany to be their ally in the Cold War?