Like racism. Maybe there's an evil genie out of its bottle that causes epidemics of crime and violence and the police are stuck in a bad incentive gradient. Or maybe someone in power is, deep down, just as much a hateful jerk as your average YouTube commenter, and the ever-so-tragic Unavoidable Genie Problems are actually just that one hateful jerk forcing his hateful-jerk policies on whole groups of people.

Or maybe populations with low IQ's are simply more prone to violence. Especially, when there's a reluctance to punish them the same way as high IQ people for fear of being "racist".