Communism, as you mean it, has been a dead issue since the USSR snuffed it in 1991, and no sacrifice of  hundreds of thousand of Americans had anything to do with its collapse. Whatever are you raving about? Vietnam and Korea had no role in undoing the USSR. Those wars were mistakes, even given the crazy logic of the Cold War.

White supremacism, however, has never NOT been a problem in American life, even if two generations of corporation-loving conservatives have worked to obscure this fact by blaming people of color for everything that's gone wrong for white working class people, including things caused by conservative economic policies. You, I'd bet, have bought this myth hook, line and sinker too.

Exactly what has "Communism" done on this scale on the USA? You sound like mad Joe McCarthy with his lists of thousands of red subversives, including Dwight D Eisenhower. In fact, it was by suppressing the "red menace" that the US got as close to fascism as it's gotten   . . . yet.