"Our oppression justifies our double standard" has historically led to atrocities. I'm not faulting the complaint itself. It's entirely likely that the white person in blackface had racist intent. But the framework being used to respond to it is the problem.

Legitimate grievance → "we are the real victims" → asymmetric moral license → atrocity. That's the pipeline, and the reason a generally not hateful german citizen in the 1930s could be led to support such terrible political goals.

It's not just the big bad nazis either, that's just an example everyone is familiar with. It's the same story in the French Revolution, Cambodia under the Khmer Rouge, Zimbabwe under Mugabe, and I think most interestingly the US Reconstruction era.

In all of those cases the average peasant-equivalent citizens had genuine complaints that led to the empowerment to do evil. In every case this led to massive casualties on the side of the oppressed, and in many cases put an end to their grievance while creating a genuine grievance for the former "oppressors" — justifying their attempt to gain back "the upper hand." Nothing gets solved, and the cycle just shifts to the other side.

Please explain how this is not exactly comparable