Interesting. The '67 riots destroyed my city, it was before I was born but my grandparents lived on the edge of where the riots ended up. Detroit never recovered, anyone with the ability to move out did over the next 20 years and you see where it is today. The interstate system displaced many of the poorest residents in many urban areas, and then the Fair Housing Act of 1966 brought drastic changes to very segregated areas. Then the riots came, and then everyone with means left. Rinse and repeat in St Louis, Newark, Cleveland, Chicago, Baltimore and many more cities across the country.
Long story short since I don't want to get to deep into this, we really haven't learned from what happened almost 50 years ago and we've repeated some of the mistakes that made many urban areas in this country nearly unlivable. Runaway crime, drugs, poverty, and a mentality of the populace of nothing to lose. Part of it is a policing problem but it is a societal problem and we love to just ignore our problems hoping they will dissolve on their own. Well they don't, and the destitute will have their say here and in many places all over the world. The more things change, the more they stay the same.