I mean... I don't get what they're lamenting, lemmy.ml, even if created by comrades, is a pretty liberal instance, comrades like yoghots (shout out to him) get censored and banned unjustly all the time, they just can't stand the fact that people have ideologies differing from the democratic party.
Those accusations come from raddle, anarchist space which admin is an absolutely insufferable moron who have tons of sockpuppet accounts which pretend anyone come there.
About what Dessalines really post, you can check his list:
https://github.com/dessalines/essays/blob/master/socialism_faq.md