SocJus fanatics are like a comparatively mild virus that, in a normal environment, isn't that harmful. What used to be mainstream liberalism is the HIV virus that destroys the immune system. Or to use another metaphor, the "normal" lefty types have a critical security vulnerability in their moral programming that psychopathic dangerhairs exploit to gain control and destroy the system from the inside out.
It always starts the same way. Some cross-dressing nutjob starts whining about how something benign is ACKSHUALLY racist, and then the conscientious lib, instead of saying, "You're a psycho, go 41% yourself," say, "Aw, gee, oh no, racism, on MY forum? Racism is so bad! I'll do anything to not have racism! Do you want mod powers to help me not be racist?" and then it's over.