When I worked for the University as an illustrator years and years ago, the mandate to show diversity was just catching on. The order went out, "remember to race 'em" meaning show different races in your classroom drawings. OK, fair enough. We learned to draw black people that didn't look like shaded-in white people, and that was a good thing. (This was before the evolution of Asians, at least Asians in Wisconsin. You had your whites, and you had your blacks.)
Then people started to complain about WHICH drawings we "raced." You couldn't have the black figures doing anything bad, demeaning, or even ordinary. It got pretty near impossible to please everybody.
I figured this was why the Isthmus illustration only showed white kids. The idea was to draw kids doing bad things, and you can't show black kids doing bad things or you get everyone's undies in a knot. So the drawing just showed whites.
It's the ya-can't-win principle in operation.