The discussion at hand is largely a discussion of ideas and how they influence behavior. What I've attempted to do is explain the lineage of ideas, and the importance of white supremacy in their inception or their spread.
As such, it is kind of jumping off topic to make a comment about actions devoid of ideas. If a white man attacks a black man, that is not white supremacy because without further context, it is largely devoid of ideas. Similarly, your hypothetical of "is it black supremacy for a black guy to impose their violent will on their Asian victim" is devoid of ideas, so without further context, I would say no, that is no more "black supremacy" than a context-less assault by a white man would be "white supremacy".
However, in speaking about the Anti-Asian attacks as of late, I have attempted to explain the ideas behind the general pattern (To emphasize again, I am not speaking about any specific incident, but instead the general pattern). I have attempted to point out that the motivation behind many of these attacks is the racist or xenophobic ideas pushed largely by white men in power (often in relation to Covid). It is the lineage of these ideas in the United States which are used to prescribe an action as influenced by white power, not the race of the individual acting on them.
Again, I find it interesting that from "Is it really so far-fetched that White Supremacy would be at the root of Black-on-Asian violence?", you read that I am blaming "all white people". This would only be the case if all white people were individually responsible for White Supremacy.
Personally, I don't believe that "white supremacy" and "white people" are synonymous but if you want to make that argument, go off King.
"racist or xenophobic ideas pushed largely by white men in power"
>So what are these ideas you refer to here and what major outlet is pushing them? If the idea is "attack Asians so the virus will go away", you'll find me agreeing with you wholeheartedly to the lunacy of such an idea but I doubt any major outlet is pushing such a ridiculous idea.
Let's get to some examples here.