There are many pieces about the murder of Michael Brown by a Ferguson, Missouri, police officer. This one, by Greg Howard at Deadspin, is one of the most wrenching:
Give a man access to drones, tanks, and body armor, and he’ll reasonably think that his job isn’t simply to maintain peace, but to eradicate danger. Instead of protecting and serving, police are searching and destroying.
If officers are soldiers, it follows that the neighborhoods they patrol are battlefields. And if they’re working battlefields, it follows that the population is the enemy. And because of correlations, rooted in historical injustice, between crime and income and income and race, the enemy population will consist largely of people of color, and especially of black men.