They have done such a great job of isolating themselves for years that they have no idea how anyone outside their bubble thinks.
Most people can't conceive how bad the isolation and purity spiralling has become. They all bullied each other off of X, and now on Bluesky they're going after people who have Substacks, because Substack is a "Nazi platform." And you can't question anything. Even asking simple clarifying questions is shouted down as "sealioning" or "JAQing off" [Just Asking Questions] or "asking questions in bad faith."
And when you're criticized you're not allowed to defend yourself or play it off as banter the way you might among normal people. The only option is to hang your head and grovel if you want to stay in the group. People see others getting bullied and don't want to lose their friend groups, so they just shut up and never question.
And then there's the IRL isolation. Right after the election I joined a Redditor discord in the hopes of finding some amusing salt (didn't stay long, it was mostly depressing rather than funny). The server had a whole fucking separate channel dedicated solely to "family estrangement," i.e., just telling each other to cut off "fascist" family members, working out the logistics, congratulating each other for doing it. And these weren't groomers aiming to isolate and target kids (groomers might have been present, obviously, but it was mostly an older crowd). It's just a mainstream Reddit/leftist thing now.