It's been a pretty consistent report of people I know who are visibly not “straight and white and ‘normal’” and whose prior US experience is limited to relatively cosmopolitan coastal areas who visit the Midwest (urban areas other otherwise) that not only does the WASP-normativity seem higher, but even minorities engage in more and more aggressive self-segregation from visibly different minorities, to the point of active avoidance on the street.
Oddly, people who are or pass as “straight and white and ‘normal’” are much less likely to report this, and often seem surprised to hear it from others.