It’s been a holy article of faith for years that it’s only “racist” when whites recognise themselves as having a common history, common interests, and shared characteristics and culture. When other races do it, it’s merely a sign of their “vibrant diversity”.
During my department's session, the woman teaching the session from time to time would use a phony southern accent when portraying something a person who doesn't value diversity might say. I grew up in the south, so this did not go unnoticed by me.
Later in the meeting, we went around the room with everyone relating the first time in their own life they were made to feel different. When my turn came I asked if it would be OK to recount the most recent time I had been made to feel bad for being different. (I know you see it coming.)
When I told her it had been in this very meeting every time she mocked the southern accent, her eyes got real big and both her hands went up to cover her mouth. I then said it seemed that diversity was only for some, but not for all.
She was mortified and room was deathly silent. She then tried to apologize but somehow it just didn't ring true.
I've always regretted not putting the icing on the cake by walking out at that point, but the session was required and I didn't want to do it again.