Yes, Black gets capitalized because its refers to a nationality--as in African-American nation, Black nation, and back in the 6th Comintern/Marcus Garvey days, Negro nation. Also as in Mexican-American.

The term 'white,' on the other hand, refers to skin color, and not very accurately at that. It's not even a race, but a social control construct put together between 1640 and 1690 to make English bondservants think they had more in common with their masters than African bondservants, after Bacon's Rebellion in Virginia. So it's lower case.

But if I use Anglo-American, Euro-American, Latin-American, or just American, then the upper case, obviously, is proper.

WEB DuBois and others waged a long struggle to get the New York Times to capitalize 'Negro,' and eventually won. When Black supplanted Negro in the 1960s, in many situations, the struggle had to be waged anew.

So yes, sometimes there's a story behind 'devilish details.'