Yes, yes, I understand your arguments. But I also think you know what's going on here. This platform hosts a lot of users who happen to be US progressives, they're angry and frustrated about the news and looking for somewhere to vent. The myriad more appropriate communities they frequent are already overflowing, so they come here too. 3 posts about this one US-specific news story in a place intended for discussion of Wikipedia articles! You know that's too many. I am not the only one frustrated with this problem - see the discussion I linked to up-thread.
Sure, the fediverse grants tools to deal with the issue. But is that a recipe for the fediverse's success, really? "Sure, it's a hellhole but once you've spent 3 months blocking and filtering everyone and everything, it's great." Surely it would be simpler if moderators just tried to get up the courage to moderate.