When someone says a thing and you deliberately interpret anger where there was none (especially after they've said it, "I'm not angry") and insist they "calm down" rather than addressing any valid criticism or complaint they actually bring up, that's quite gaslighty. It's intentionally presenting a false reality and insisting I adhere to it "or he's just wild, he won't calm down".

Or "he's just a troll not worthy of consideration" as you put it. Which is definitively dehumanizing as well, but you don't see me whining about it. It is ironic though. Me calling childish arguments childish, whoa! You calling someone a troll, that's perfectly reasonable. You calm down.

It's not strictly the same as gaslighting but that's why I said "gaslighty". But go off about the hypothetical strangers I belittled, please, whatever gets you going down there.