Not sure about the data, but based on the people I see every day and talk to it's poor and mentally ill native and white people. The black community is fairly small here and consists of a few south African families who were not participating in the protests, at least from what I could tell seeing one of the families on the beach that day, while some members of the other were working.
There was an older black Lady who looked at all the white families with their kids protesting who shook her head and called them idiots that i seen but otherwise, it was a bunch of white people yelling about black lives in a community where the main racial problems that do exist are towards natives and there wasn't a single mention about that from those people. The homeless native guy drinking and smoking crack on the street next to them matters less than some guy killed by a cop in the States.