This is quintessentially why most people hate "cancel culture"/"political correctness"/etc

Even though they're getting away with it, you are telling them that they are a bad person because they get their kicks by treating people like shit when they know they can't fight back. Hence the hysteria on whenever a nazi gets punched people go "Wow, you really think words should warrant assault? Free speech bro!". Sure, they don't mind being perceived as bad people, but they still hate it that someone would dare to nag them and tell them they're in the wrong for going so low as to pick fights just because they know they can win.

It's no different than the school bully bullying someone, and then ratting their victim out to the teacher when they fight back, knowing that teachers care about popularity too.