Yes, that was arguably provocative. But replies should reduce provocation, not amplify it. Replies that reduce provocation help steer threads back onto the track of thoughtful conversation. Replies that amplify provocation help derail threads into flamewars, which are predictable, nasty, and tedious.
But it just so happens you never have problems with racism or other hate speech, only with people who point it out. I wonder why.
That's quite false of course. We moderate such posts all the time.