I've never seen this. I've only seen people say "Racism is bias PLUS POWER. It's literally impossible to be racist as a Y because Xs have power." I've not seen people say "Yes of course we'd traditionally call Y a racist, but what I mean is that they aren't being institutionally racist."

No one's talking past anyone. It's obvious what's going on. They don't want to admit that non-Xs can be terribly racist. So they flip words around so they can, at worst, say "well they may have prejudice". They invent stuff like "reverse racism".

And in fact, that's what Github's code of conduct enshrines.

It's intellectually dishonest.