This isn't the entire cruz of the matter, but it's an important element. The black community needs more entrepreneurs. They exist, here and there, but the hustling small business community in the inner cities is heavily immigrant. The people who are out rioting would never dream of starting a business. They are looking for the next government check, or if they have some self-respect, for a government job. In their view, prosperity is given by government, and it is maldistributed. I don't know how to change the culture, but I would go out of my way to patronize a black-owned business, if we had one in the neighborhood. But the Koreans own everything.
I was stationed in Korea for two tours. The Koreans are some of the hardest working people on this planet and are usually natural businesspeople.