I think its the systematic way they fucked up. Like the 50's and 60's had huge massive social problems, but the idea that like labor builds the world and we should have collective wealth and distribution was like in the space and social democracy was sort of a thing. There was some real communism that could have, if not for terrible luck and historical contingency, really built something better. And the boomers around the world were like "yeah but what if we keep most of the bigotry and we burn down social democracy for a condo in florida?"