Migration was the one big issue that carried Brexit. It made them all forget anything else and blindly believe brexiters, if only there were no more brown people coming into the country.
It was the racist vote.
But besides that, there is racism everywhere. How its dealt with is the difference. I’m personally very glad to see the big counter protests now. They have become too confident to be loud about their hate again and we all have to put them back into their place, making it clear that this is not acceptable.