Yeah, nothing makes a body feel more welcome than being called a gentrifier. Ask me how I know. The several nearby homicides that occurred within the week after we closed on the place really helped make us feel at home, too. And I really miss sitting out on the back stoop for a late-night smoke to the sound of sporadic pistol fire in the middle distance. There are places in Baltimore you can go if you want to live around nothing but white people. I didn't leave East Baltimore for any of them. But I sure did leave East Baltimore.

It's very easy and very comforting to say that maps like the ones you linked are just a result of white people not wanting to live around black people, because white people are racist. I get that. Who wouldn't rather believe a just-so story than acknowledge that not everything is simple and not every problem has an easy solution? Just don't make the mistake of confusing a just-so story with reality, or imagining that by doing so you're very likely to be of benefit to anyone.