The alt-right wants to insist they are the norm, but it's not true. Americans elected a black President, interracial marriage is increasing dramatically as are other black elected officials, and racism by a political candidate is a career-ending mistake.
The big football markets are major cities, such as New York, which are even more liberal and ethnically diverse than the rest of the country.
I dunno, there seems to be a pretty big reaction to the progressive official story going on in this election, and those people are coming from somewhere. Considering the SEC is the biggest football conference in the country, and it's based out of Texas and the deep South, which rather reactionary regions.
There is far more to the USA than the major coastal cities, and if you go out into the hinterlands, you'll quickly find that there's a goodly number of people that aren't as progressive as some would like.
The big football markets are major cities, such as New York, which are even more liberal and ethnically diverse than the rest of the country.