I don't really disagree with you but I believe the point of the post is that no black person would be able to occupy those offices with such condemnable offenses.
It's "shut up about DEI" because there is clearly already preferential selection of white people.
But yeah, small-scale righteousness has done lots of harm to the left. Especially in policing what is politically correct. Sure, somebody might be "in the wrong", but it's better to have that person on your side than against you.
mildly NSFW