There's a sense of state failure and into state, failure comes private actions to protect one's family and one's community, said Omar Wasow, an assistant professor of politics at Princeton University who writes about race and the politics of protest movements.
You take that and you layer it on the long, deep-rooted racist mythology that says, 'I should be scared and black people are a threat,' and you get a kind of circle-the-wagons behavior.'
Peter Baggenstos has felt the tension in his neighbourhood, a largely white, wealthy pocket of Minneapolis about a mile from a stretch of stores that were vandalized. Baggenstos, a doctor who is African American, said he senses a lot of passive policing" at night, as neighbours keep lights on and trade text messages about cars or people on the street after curfew.