It's really shocking behavior. The town where I live, for whatever reason, has seen an influx of educated African Christians. They are nice families, well spoken with British accents, have polite children and keep their properties neat. Even their less-educated nannies from Africa and visiting parents who don't speak English are respectable Christians. They don't like American blacks and the feeling is mutual, since the African-born blacks make the American blacks' constant grievances sound false and self-indulgent. So it's not genetic; it's just bad attitudes and the American blacks allowing themselves to be corrupted by Democrat identity politics continuing to fight the battles for civil rights as if the laws and social customs had never changed over the past 160 years. The changes have been dramatic, to those of us who are older than 60; then you get old white ignoramuses like Biden and Hillary denouncing whites as if it were 1866.
Startling truth in what you say. I grew up around a lot of black families in San Francisco. Decent folks. About 20 percent of my block. I played in buildings in the projects (low-income housing) with black friends. There was a shift in the 1960s where young blacks started getting bad attitudes and chips on their shoulder against whites. Not all, but enough to start making crime worse. I've seen it in talking to black middle-class friends who told me about their children and grandchildren adopting ghetto behavior, even though raised better than many whites. Some of my friends were Oreos (more white on the inside than white people I knew). As I say, not all blacks, but some turned bad with bad attitudes. But enough to make it bad for all. Feel bad for the good blacks painted with the same brush by other races. And feel bad for the young blacks caught up by democrat identity politics which is confusing for them.