Seconded. Every community demanding “civility” needs to enforce good faith ten times harder than they enforce mere politeness. I am completely okay with someone being rude… if they’re right, and they can prove it. A conversational “that’s dumb, here’s why–” is infinitely better than leaving nonsense unchallenged because an interested party said a no-no word.
And if someone’s wrong in a way that’s not excusable as a mere mistake, telling them to quit their shit is a necessary part of dealing with trolling and disinformation. Treating bad faith as good faith is what trolls want. It is a key component what trolling is. Any moderator scolding people for being blunt with an obvious bullshitter is building a community primarily for bullshitters.