I have every belief that this behavior is taught. Some, perhaps many, are drawn to this type of job for the power. But I have no doubt that the training drills in the "us vs them" and the "DO WHAT I SAY" mentality. The fact that they all believe that chanting "stop resisting" protects them like a shield while they beat and kick those who are down and subdued tells me that they are trained like this. Maybe I'm wrong. But I doubt it.