That's racist America for you.

Black fighters in England are mostly concidered as English.

Around the 1790's a man going by the name Bill Richmond a former black American slave came to England and set up a boxing academy.
I bet not many blacks could of done that in America.
Tom Molineaux another former black American slave also moved to England.
Molineaux challenged Tom Cribb for the British Empire and world title and narrowly lost in the 39th round.
He was also lived like a champion in England, and died in london after endulging.

I believe Chris Eubank left America and moved to England. He started off as a cleaner in a gym.

I think it's something to do with Americans feeling inferior to other white races which leads them to being so stupidly racist towards good hard working people sometimes.