They should look at Watts and be very concerned.
Take a look at Compton, CA. Compton is next to Watts. Black people are being told to get out by the Klan with a tan. There is a lot of friction between the Mexicans and the blacks in the LA area. They really don’t like each other.
Watts? My (deceased) grandparents' house is in Watts. My old aunt and uncle still live there, and are practically the last black folks still living on their block. It's mostly Hispanic now.