Call it one part racism, three parts utter indifference, with an occasional dash of one or two exceptions actually giving a damn and attempting to do the right thing.
You're correct that no simple definite conclusion can be reached here on logic alone, however from context many can distinguish a hawk from a heronsaw given a favourable wind.
I know that this is frustrating and sometimes can look very much like opportunistic virtue signaling, and many times it can be, but I would caution against immediately dismissing such claims when they are made and defended by parties that otherwise would not have reason to do so.
[1] I wish we had a different word that didn't have all the loaded connotations inherent in 'racism' especially with its use in the past as a excuse for slavery, but we don't...
I was enjoying reading what you'd previously written but changed, about domain knowledge and how domain experts can guess based on the outcome what was likely going on inside the system (EDIT: paraphrasing from memory, so I hope I got it right). I'd never thought about it like that before, very interesting perspective. But even then you'd have to be careful to make bloody sure your assumption, experience based though it is, was actually factually correct before tarring someone with racism.
I hope my interactions here don't coming off as me dismissing people concerns/claims. I'm simply trying to take an objective view of the situation as presented. I'm aware that some people consider objectivity a problem in and of itself.
I hope you understand my hesitancy in such a public medium, and I appreciate your feedback.
Either way I've enjoyed this discussion and have learned from it. I wish you all the best.