I'll be the one to talk about the other side of the coin here, although I do agree with you on principle. There's a petition going around to fire a University professor who is a dot Indian, and she proclaims on the daily to "eliminate whiteness" and "white lives don't matter." Because she teaches, she really should be fired, but where do we draw the line? It's okay for "us" to do it, but not "them?" Or are "we" just doing what "they've" done to us, a chicken/egg scenario?
The solution is for the common person to stay anonymous when ranting about these things. That's it. Let the professors, Hollywood types, and politicians put their foots in their mouths. Never trust co-workers or casual friends to not repeat what you say in the public sphere. Don't give them ammo.