So then they should view everyone as their enemy?
If your son or daughter is a cop, what would you advise them to do?
If they are hired straight out of the military without enough transition and training then they probably do view the public as the enemy. Police is a very confrontational job that pits them against the public and need very extensive detailed training in threat recognition. Not enough training then yes, everyone is your enemy. Problem is that with every police/innocent citizen shooting, the police will be viewed as the publics enemy instead of peacekeeper.
It is getting close to the point that much of the public is starting to view cops that way.