Bingo. Math education is to math as astrology is to astronomy. I'll eat my hat if this particular professor can describe a quadratic equation, much less solve one. Too hard? Call it "racist" and you don't have to learn it. Or teach it.
You are spot on with your observations.
Mercator chart projections have been called racist as well
because of the distortion that result when going from 3-D to 2-D. However, the mercator navigation charts are drawn so that on the vertical lines, one inch is the same distance on the entire chart. If not navigation is much more difficult.
Almost no black people succeed in military aviation or as submariners. Ever wonder why?