No of course not any of those things.
The question is cause and effect. Terrible things happen for a variety of reasons - sometimes because leaders want terrible things and sometimes because leaders want good things but are fools - I won't try to list every possible reason.
The notion here is that a black mayor probably didn't want bad things to happen to blacks, so this specific incident probably was caused more by mistakes than malice on his part. Further, blacks and whites probably makes mistakes at similar rates. So, some incidents with white mayors may have also been caused my mistakes, not malice, we've now agreed there's a baseline level of mistake making.
The point is, intent matters. If Joe Biden passed the 94 crime bill because he hates blacks, that's different that Joe Biden passing the 94 crime bill because he thought it would do good, and turning out to be incorrect.
Fwiw, I've never understood how anybody could not get the point here. It's obvious, just incomplete and kinda hand wavy.