> They go quiet or form a tiny invite only groups to hide after an attempt to do something good that backfired because their skin is the wrong colour or they aren’t trans.

I don't mean to be snarky since I don't know the specifics of situation your friends find yourselves in, but... is it possible that they should just grow thicker skin? I mean twitter is a cesspool of hate, bitterness, and anger. But you can simply not open it and ignore it, no?