Comment by AnimalMuppet

I think a big part of it is the public space. Let's say I'm on X side of a debate. I can, in good faith, try to talk to someone from side Y. I might find some such person, or even several.

The problem is, if we're talking in a public forum, anyone can come up (from side X, side Y, or both) and jump in not in good faith. And so I get, as Fellshard said, my hand chewed off, not by the person I was talking to, but by a bunch of drive-by conversation-killers.

Under current conditions, I don't think a real conversation can happen in public (which includes social media).