Don't forget that WASPs often excluded entire professions to what they considered 'lesser' whites and catholics and Jews.

Ben Shapiro once said that Jews might not be good at the NBA like blacks when he doesn't realize (or does but is lying) that Jews dominated basketball in the 1920s and 1930s. Ironically then as now racism played a role in stereotyping them. Since Jews were seen as crafty and intelligently sneaky this was seen as manifesting in the sport, which often does need deception to get ahead.