Sorry, I understood it as an argument with a claim. Eg. "anyone who asks for change while providing any source of information, regardless of how flawed it is or whether the person in question even represents those whom this change might affect, is a decent person". Claiming that "anyone who calls out other people doing so, even if the other did it in bad faith," must be a fascist.
That said, English isn't my first language, so I might very well have used fallacy wrong.
I know neither Mia nor Rimu, so I have little prejudice against either.
Rimu clearly went overboard in the snippet, there's no reeling that in anymore. He does sound very tired, like he's been slighted more than once, but that was a whack example to come swinging with out of context.
That said, I cannot label Mia's first comment as purely good faith either. If this Rimu is a well known personality with well known peeves, and Mia was aware of this, then it would be more akin to trolling or rage-baiting. Otherwise it would simply be ignorant or unlucky.
Either way, I've known neither till before this post, so I'm not gonna pretend I know what's going on in a broader sense, nor even be as audacious as to pretend to know what's going on in their heads.