Yes, but it isn't The only defining characteristic, like being a Black Militant is not a racist term but is only applied to Black people of a certain political stance and attitude.
None I am aware of, difficult to turn pink with a base colouring of brown, but more importantly tend not to be quite so "Britain First" in their outlook. Not met any POC who are white supremacists either but theoretically they could exist.
but they are not judged on their gender or race, or even their politics, for example Mark Francois holds largely the same political views as Jacob Rees-Mogg, Mogg is not Gammon though, and it is not because he is upper class, it is because he states his nasty views calmly.
Piers Morgan is the other remain voter many of them like but, they forgive him because he was happy to leave once the vote went that way, and likes to use the term remoaner.
Bomer and Millenial aimed at an individual are a bit unfair, not a lot you can do about when you were born, but Gammons can choose to chill out a bit and stop using phrases like "charity begins at home" when the topic of Foreign aid comes up.