So the police act as if targeted by guerrillas at all times? Sounds strangely of actual class-warfare. As an extreme counter example, I've understood Norwegian

So the police act as if targeted by guerrillas at all times? Sounds strangely of actual class-warfare. As an extreme counter example, I've understood Norwegian police are unarmed and pick guns only if situation obviously requires it. So there is nothing intrinsic in the role of a police officer that would require this level of aggression. Is US really that violent?