@rose no idea. But I think a lot of it too is that people are genuinely traumatized and hurt and have other stuff going on in real life and so they read their emotions into what everyone else is saying. I think that's what happened to me in the most recent case, where someone said something I wholeheartedly agree with and So I responded with a whole long post agreeing with them and then tacked on a reply to myself with a small little caveat clarification for people who might misread what I or they were saying and they immediately responded as if that was some kind of rejection of what they were saying or that I was claiming they were saying the thing I was clarifying against or some indication of fragility or defensiveness or whatever when it really wasn't.
And it affects me so much is that when someone starts accusing me of something or gets mad at me I immediately strive really hard to figure out the way in which what they're saying could be true, to find the kernel of truth in what they're saying that applies to me, so I take everything people say way more to heart and way seriously then I think social media interaction styles are typically built for, and then my continuous engagement with them trying to clarify what I was actually saying and doing and come to some kind of mutual understanding with them, even a compromise, is interpreted as combativeness. But I can't accept your criticism until I understand why you are making it and how it actually applies to me. If I was really unwilling to take criticism then I just shoot off some witty sarcastic response and then block you.