History lesson for sigma:
Russia didn't save anyone but themselves. They invaded Poland almost simultaneously with Germany, therefore they were initially aggressors. Then they were attacked and when they were able to go on the offensive again, they did. History and Communist doctrine states that worldwide domination is Communism's goal. When the Russians conquered, they didn't leave (they had to split with us). So Communism was viewed as more of a threat, unlike our policy, which is shortly after invading and occupying, we establish democracies then leave (for the most part -- but we are in no way an occupying force).

I agree, without the Russkies on the Eastern Front it would have been a much longer war, but I could argue that without the threat in the west Hitler would have been drinking Vodka in Moscow not long after Barbarossa began. So that's a dumb argument, almost as dumb as suggesting that Communism was some kind of saving force.