I hope you don't mind me asking, but why do you capitalize 'black' ?
I don't mind you asking at all.
I suppose there is no particular reason I do that just like there is no particular reason why you put a space between your sentence and the question mark while others, myself included, do not. It's just the way I/You/We write.
If I were to write the word "White" in referring to people of the White race I would use an uppercase W also.
Cheers