Joe's post can indeed be read in the way meself suggested it could be,   with the general points he makes from his experience directed at Azizi.   I very much doubt that would have been what Joe was intending.
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So far as overt and intentional racismis concerned, I think you can indeed expect that there will be a response from "people of good will regardless of their 'ethnicity'". If the post survives long enough to get a response.

But there are plenty of times when it's not racism as such, but a kind of misunderstanding, or an unexamined assumption - "troubling attitudes or ideas pertaining to race" as meself put it. And I think a lot of those "people of good will" are less liable to feel they have the personal knowledge that is really required in a response. Or they may well not pick up on the "troubling" nature of the post - thye may even share that unexamined assumption.

A lot of the time, when some post indicates a damaging misunderstanding about our corner of the world or something like that, and we feel some response is needed, by the time we get round to sending one, it's already been done. We don't have to feel we are the only one who can do it, because we aren't. But if we were, we'd be in the same position as Azizi, and I think we'd find it "difficult" at times.

I thin this has been a pretty valuable thread.