I think that the reason people and journalists capitalist the 'B' in "black" is to put them on a pedestal...just another method of infantilizing black people and committing prostration and self-flagellation.

When I was younger, "black" and "white" weren't capitalized when describing either people.  I stick with it to this day.  The real concern should be using those words without following them up with "people", but even that's dubious, because calling people "blacks" and "whites" has always been a thing, and it's only becoming an issue because people are ultra-super-hyper sensitive, even so far as to say that calling white people "whites" and black people "blacks" is a false equivalency....meaning, calling black people "blacks" carries some offensive undertone, whereas calling white people "whites" doesn't, or is even "unheard of".  But, to that, people need to lighten up and stop following whatever æther of hate they're on.....if there is any such "æther of hate".