There are though absolutely places with a large black population which have serious crime issues, but you see similar crime rates in impoverished areas that are predominantly white. Calling it a problem in black America makes it seem like a black problem when that is correlative rather than causitive. Poverty is the core.
Historical inertia, past (though fairly recent) laws, etc... are part of a complex story of which the result is poverty among a specific demographic (though not limited to that demographic of course - the extractive mining towns in Appalachian areas created parallel stories of systemic poverty in predominantly white regions).
It takes a long time for societal wounds to heal.