Question: Should the U.S. have joined Hitler early in World War 2 and attacked Russia?
This was seriously proposed early in the war (1939-1940) when Germany was slaughtering Poland, France, and other western European countries. Even at that time, we had many right-wingers in the U.S. more opposed to Communist Russia than to Fascist Germany. The theory is that, together, the U.S. and Germany would have easily defeated Russia and thus avoided the Cold War which occurred after World War 2. Also, many at the time thought Hitler was invincible and that we might as well join him.
But that is all wrong! Stalin was a monster and communism was bad but Hitler was an even worse monster and fascism was just as bad as communism. No, we did the right thing providing materials to Russia as much as we could until we actually were forced to enter the war.
It should also be pointed out that, even had we had formed an alliance with Hitler, and destroyed Russia, Hitler would likely have broken the alliance at some point and attacked us. Hitler was not know for keeping his word!