Instead of helping the Soviets, we could have let Hitler get over-extended in Siberia and taken Germany before he could reverse field.
Somehow I dont think Americans would have been thrilled with 5M or 10M dead Americans instead of .25M. Actually, quite a few less against the Germans.
Next time, think. Patton had it right.
I think if the Nazis took Moscow, Stalin is overthrown. Perhaps Khrushchev would have led the coup, or maybe the Bolsheviks are tossed completely.
Abandoning an ally and then attacking him is something only an absolutist and utterly dishonorable government can do.
Thank goodness the USA, at least then, was incapable of such a thing, regardless of how much sense it might have made from a geopolitical sense.