We are talking 50 years with little healing or building of trust.
A faction of politicians, civic & religous "leaders", and community organizers, exploit and profit from the social and racial animosity and divide (and behave in ways to keep it going).
I thought Rodney King said it best: "Can't we just get along".
IMHO - Rioting never built anything. It kills communication, trust, opportunity, ruins lives, takes lives, ruins the quality of life and the chance for progress.