This is why Police use caution when dealing with MJ dealers. It is controlled and traded by violent people.
You'd have to blame our government for that one. Just as alcohol was once controlled and traded by violent people.
Excuse me, the dealers in this case were medical pot license holders, and who possessed and used firearms for defensive purposes. The dealership was robbed by violent people. The gun-toting criminals in this case (federal law notwithstand) were armed robbers, one of which was fortunately killed in this transaction. Apparently you are so blinded by the War On Drugs that you can't even see the different between the perpetrators of a violent crime and the victims of same - one merely proves the other interchangeably.
You have a serious disconnect with reality, which is made only more frightening since you apparently have a gun and a badge too.
For soldiers who are charged with the task of killing and destroying, that's fine. But for police officers who are charged with the task of serving and protecting communities - well, I'm glad you're about a thousand miles away, although there are probably many more like you here in Colorado, unfortunately. I yearn for the forgotten days of the Peace Officer. I do not care for paramilitary assault squads, whose primary target is US citizens.