Sorry but that's BS, lots of Western anarchists glorify Bookchin which can't be said about tankies and Pol Pot.
I got instantly perma-banned from anarchist subreddits simply for quoting some of his Zionist ideas (with sources) to add a bit of context to posts promoting him.
No communist space will ban you for critisizing Pol Pot, quite the opposite, they will ban Pol Pot sympathisers.
I really don't want to disagree with you, but there was this one discord channel that I was banned from due to my unfavorable opinion of Pol Pot...
The world's a big place and you can find all kinds of superfringe wackos. But getting back to the main post, anarchists do try to rehabilitate their problematic figures significantly more than communists do.
As Trudge said I am sadly aware of too many people stanning Pol Pot or the Shining Path. We gotta always be aware of those among us that have problematic takes. Patsocs being another extreme example.
I remember once getting a book of Murray Bookchin's collected works (or something from the library). I had assumed that his social ecology would fit well with my environmental interests (it was environmentalism that led me to anti-capitalism which led me to communism). Anyway long story short I couldn't understand a word of what he was saying. It was english words, but it's like it wasn't english sentences. To some extent it's similar in ML circles -- we use certain words in ways that are different. But it honestly just seemed like drivel. If anyone can summarize it for me or link an article that explains it I would appreciate it, as I've heard that Murray Bookchin's writings have also been adopted by some middle east factions (but I don't recall any details, so don't quiz me please).