About a year ago the Associated Press changed its stylebook to say that the letter “B” should be capitalized when describing people who are Black. The main argument in favor of this change is the recognition that being Black carries with it an identity that transcends the color of one’s skin. It is a descriptor that is closer to Irish, or Polish, than it is to white.
Recently, The Washington Post made the same style decision and a group of the Post’s Black journalists talked about it on one of the paper’s podcasts.