That is now their training. You couple that with lots of vets from Iraq and A'Stan become cops with military skill sets and the 'gifts' of militarized hardware from the feds, cops now treat their beats as war zones like Fallujah.
With fed training manuals that teach them that Constitutionalists and Conservatives are domestic terrorists - it goes to figure kill first, deal with consequences later are the policy.
Now the push is on to 'federalize' all the police under the guise of 'stopping' another Ferguson. The Beast just wants an excuse to do that and inciting racial and civil strife is how they achieve it, to the applause of Joe Sixpack and even Conservatives who rah-rah cops no matter what.
They have no idea what is being created to be used against them by a federal beast.
Uhh, our troops in Iraq and Afghanistan were and are, I believe, required to operate under rules of engagement considerably more restrictive than those applied to American cops when dealing with American civilians.
I remember when they were sending cops over to Iraq to teach the troops how to disarm the terrorists without shooting them. Now they shoot people holding a rake or a drill or whatever with impunity, and they kill their little dogs, too.