Joe Queenan is one of my favorite writers. Here is a paragraph from his latest review essay:

I do not object to Yankees fans in principle, so long as they are
homegrown, preferably natives of the Bronx or Yonkers. (Yankees fans
born in Queens or Brooklyn, it goes without saying, are Iscariots.) But
those of us who grew up in fiendishly inbred sports towns like
Philadelphia, Cleveland, St. Louis and even Boston cannot stomach the
kind of parvenu, out-of-town front-runner who becomes a “die-hard”
Yankees fan without any moral, cultural, ethnic, genetic or geographical
connection with the team. And like most Americans, I reserve my
greatest antipathy for the millions of bogus Yankees fans in the pink or
green or red Yankees caps one routinely runs across in London, Rome,
Sydney, Stockholm and Mombasa. Or, if driving, runs over.

My sentiments exactly.