So your argument is ignore the millions of Soviets that died defending their homeland from the Nazis. Ignore all the German Leftists, Socialists, Communists that Hitler specifically went after his rise to power and murdered? And now they're magically allied. Next you're gonna tell me America and Japan were actually allies during WW2.
I am just stating facts: moscow fucked around and found out, thats what you get by being a historical shit stain on the map and trying to join fascist alliances.
They aren't magically allied, moscow wanted to be allied with nazi germany and continue comitting atrocities/land-grabs together just like they did in Poland, but hitler said no and launched an invasion into ussr.