Another analogy then - captured Allied servicemen suffered dreadfully in Japanese prisoner-of-war camps. I knew more than one, none of them could speak of their experiences.
Japanese geisha girls traditionally have very white faces. Are these depictions racist abuse of "whites" ?
Would the veteran servicemen be traumatised at posters advertising Japanese films with geisha characters? Of course, almost all of them are now dead, but should the feelings of their living relatives be considered when a film is being promoted, as the feelings of living relatives of past slaves are considered?
Is their memory sullied by depictions of white faces by the descendants of their torturers?
If the fact that it was a tradition long before WW2 were better known, would some people STILL insist that the women were made-up in tasteful shades of pink? No, I suspect that the cry would be that old tradition should be respected.
Another - my food hate is marzipan, and the peel you get in mincemeat. At Christmas, I am everywhere offered traditional fare, whether at friends houses or in restaurants and cafes. I quietly pass on the cake (marzipan) and mince pies (peel). I don't expect my hostess to keep them out of sight until I have gone home. If she pressed one upon me and insisted that I eat it, like Granjura with the liver I would feel sick, but with my knowledge of the Christmas traditions the sight of other people tucking in doesn't freak me out.
I think there should be more information about black faces and less assumption that it is ALWAYS something that someone is entitled to complain about and get banned, whatever its origins. Otherwise there is a very real danger that one group becomes a sacred cow and all other groups are sacrificed to it. In the long run, that sets them up as a target for resentment - which is the reverse of what action against racism is aiming for.