You’re kinda proving their point lol. If you consider the US during that era to even slightly lean left then you have no familiarity with left wing policy and ideology…plus there was the whole, “oh shit, Communism is growing in popularity, quick give them the most bare bones social safety net so they don’t get angry enough to demand actual socialism” thing before they could get the cold war facade up.

The path is more important than the destination. Knowing the end result of a genocide does not help in prevention; however knowing step by step how a group of people was convinced to murder/torture/rape/enslave/dehumanize the entirety of another group of people is a massive help in preventing it.

Open a history book, please. The Nazis plan wasn’t to kill all Jews, it was to deport them all elsewhere until they realized how absurdly expensive that was, then the plan kept getting worse and worse until the gas chambers era that somehow is the only fucking thing people know about Nazi Germany now.

Between Putin and the ongoing operations carried over from the USSR, it’s not as dead as you’d think. Kinda like Rome but different.

Animals work together very easily and frequently actually, same and different species, even things called symbiotic relationships. That argument is proving your point wrong and indicating that most hatred is indoctrination.