Police officers confront protesters in Minneapolis after the death of George Floyd. By Michael PriceImages and reports of people taking to the streets to protest last month’s killing of George Floyd by Minneapolis police have sparked conversations among Americans on police use of force to control crowds, the morality of looting, and the destruction of property to vent anger and garner attention for a cause.Divergent perceptions of the unrest have roots in unconscious biases and knowledge of historical contexts, says James Jones, a professor emeritus of psychology at the University of Delaware, Newark, who has studied the psychology underlying prejudice and racism.