Edit for clarity: I'm not asking why the Tankie/Anarchist grudge exist. I'm curious about what information sources - mentors, friends, books, TV, cultural osmosis, conveys that information to people. Where do individuals encounter this information and how does it become important to them. It's an anthropology question about a contemporary culture rather than a question about the history of leftism.
I've been thinking about this a bit lately. Newly minted Anarchists have to learn to hate Lenin and Stalin and whoever else they have a grudge against. They have to encounter some materials or teacher who teaches them "Yeah these guys, you have to hate these guys and it has to be super-personal like they kicked your dog. You have to be extremely angry about it and treat anyone who doesn't disavow them as though they're literally going to kill you."
Like there's some process of enculturation there, of being brought in to the culture of anarchism, and there's a process where anarchists learn this thing that all (most?) anarchists know and agree on.
Idk, just anthropology brain anthropologying. Cause like if someone or something didn't teach you this why would you care so much?
May I help your imagination?
I often wonder what would have happened if various nations in the Eastern Bloc had been designated as buffer states, and allowed multi-party democracy, woth just pro-capitalist parties being suppressed. Including assassinating the occasional fascist that popped up in the big-tent movement. But "every possible party except mine is a pro-capitalist party" is not a useful or serious position.
I wonder what would have happened if RIAU and other groups holding territory against the Bolsheviks in the early USSR would have been truced with in order for them to dedicate their war efforts against the invading imperialist powers, and then granted special autonomous/devolution zones.
I wonder what would have happened if some of the demands of the striking sailors at Kronstadt, like plurality in the workers' councils, were granted- whether having the experience of 5000 socialist soldiers instead of having their blood being shed would have influenced the Winter War or even the Eastern Front of WW2 as a whole.
I also wonder about the missed opportunities from the party officials and public figures killed in the Great Purge, but that extends far beyond anarchists. With the degree to which the USSR was fighting itself for its first 2 decades especially, it's easy to wonder whether it could have avoided the political dilution and degeneration of the second half of the twentieth century.