Communists acknowledge the necessity of censoring harmful ideas and effectively communicate their rationale. Meanwhile, liberals criticize communists for such practices while simultaneously advocating for the suppression of dissenting views. This exposes their hypocritical stance on free speech and open dialogue.
On the various posts in this current flood of "Communists should leave the communist instance for my own comfort" nonsense, even the anti-.ml crowd can't provide good examples of how anyone who looks at them funny gets banned. Nobody has modlog receipts and almost every example THEY provide of communists oppressing them or whatever is THEM saying dumb nothings like "I can't hear you over Tienanmen Square" or cussing up a storm while the .ml person is like "Here's a book about XYZ"
I'm sure people have been perhaps hastily moderated on .ml, but probably not any more than any other instance, and if so they aren't the ones rallying to de-ML .ml.
I think a lot of this is basically culture shock of people realizing that their views aren't dominant on the platform and having their deeply held biases questioned.
Not only that, but Reddit refugees too idealistic for Reddit, but without niche interests guiding them to a niche instance, plus a desire to not even be federated with Marxist instances.