If you call out genocide denialism you get banned.
Which is the reason I stopped participating in some of world’s news and political communities, but because of a different genocide.
But I certainly did not go running to a community that promoted denial of other crimes. Instead I use the power of lemmy to pick and chose healthy communities.
Each instance has communities which are toxic.
It’s something that is sporadically done, by some people based on the phase of the moon or what they feel like; but it’s tolerated by the other mods.
One does not see it much unless it happens to oneself or it’s read about elsewhere. However it certainly has an effect and perhaps is one of the reasons there are cycles of low engagement ( or at least lower than normal). Often people like me who have issues with it just quietly go elsewhere, which I more or less done.
But once I moved away, choosing a non political server as my new home, I was exposed to all the communities world blocks, and it was then I realized I had been censored