This is yet one more of the hidden costs of the Afghan and Iraq wars. You have a large population of soldiers, many who come back home after their tours of duty, where they were in effect an occupying force. And then they get a job in law enforcement. They are used too a certain way of doing things in Iraq and Afghanistan, and they bring that culture home with them. Even for those who didn't serve, as the article not…
The vast majority of these police have no military background. It's cargo-cult behavior, not experience.
But I also think (key word, think, it's a hypothesis, no current hard data to back this up at this point, see above paragraph on how I need to do this, but I've been too lazy/busy) this may be highly regional. In the sense that I live in a state with a large number of military bases/troops/persons who go into the military. They come back from their deployments, they go back home, they join the local PD. Some states have less of this than others.
Further, others have made this point, and I guess I was not as clear as I should have been, but in part, you only need one officer who's a vet to come into the department and he says, "When I was in Iraq, this is how we did it..." I don't think that's a huge influence, but I do think it's part of spreading the military culture that the original article is talking about.
Call it militarization of the police, hero worship, cargo-cult, whatever. I believe at the end of the day, the effect is the same, the GWoT has had negative impacts on how America has chosen to police itself.