An aggressively performative focus on social justice.
In other words, it's people being prigs about social justice. And that's the real problem — the performativeness, not the social justice.It's not performative. We really do believe that there are injustices and that if we can begin by changing the language, we can change the behaviour.
Just because Paul Graham can't imagine himself sincerely believing in self improvement followed by social improvement doesn't mean we don't believe it in ourselves.