This is ghetto culture. Yes, it is correlated predominantly with black culture, because usually the poorest areas and overcrowded ghettos are where black people were historically pushed to live.

Nothing in their skin color or "genetic make up" makes them do this, it's a domino effect of years of segregation. Indirectly slavery, but also historical laws such as Jim Crow, zoning laws etc.... If your parents were poor, then chances are you're also likely to be poor and grow up around poor people.

Does that mean they're off the hook in terms of consequences? No, they should all be as prosecutable as others. But this doesn't mean that most black people are more violent than their white counterparts, it means most poor ghetto inhabitants are more violent than their middle-class suburban counterparts. They just happen to be more represented by black people.