"Discriminating" used to mean to distinguish accurately, to note or observe a difference. Read my real life experience in Detroit to see the dry humor between that meaning and today's primary definition of the word: lifewithboots.blogspot.com
It is a beautiful thought, unfortunately Jk has proven that she herself is racist/prejudiced and should stop. Ilvermorny houses (stolen from various Native American tribes, and magic school was founded by WHITE PEOPLE WHO CAME TO AMERICA!), and Fantastic Beasts movie (no black people/poc in Harlem in the 1920's).