Black culture, or the culture of poverty? How do white, Asian, and Hispanic youth do when they're raised in a similar environment?
It was pointed out above that San Diego is a desirable place to live, but fairly expensive. Now, let's compare that with another California city that has few blacks, but a lot of poverty. Fresno is smack in the middle of the state. It's not a bad place to live if you have at least a middle class sort of income, but a lot of people don't. So, what does Fresno have that San Diego doesn't? A high murder rate, a lot of crime, drugs, and gangs. I don't have stats on its murder rate compared to Philadelphia, but I do read the local news. Drive bys happen all the time, as do "gang related' murders.