A possible best case scenario:
Hitler takes Moscow.....as a result, Stalin and the Bolsheviks are overthrown and a new non-Communist leadership takes over the defense of Russia, and rallies the Russians to victory....And in the end, both Stalin and Hitler are out of the picture.
Exactly. Instead, our glorious leaders Churchill and FDR allied themselves with the genocidal Stalin, and it certainly wasn’t to save the Jews.
Always the “bad guys destroy each other without us having to get involved” scenario.