No, I'm a former Marine and I carry a pistol on my person daily as a citizen in the civilian world. I don't magically run around in the world assuming that everyone in life is on the verge of pulling out a weapon and dropping me. However, if you are actively intruding into my world and demonstrating aggressiveness toward me and a willingness to do me violence, then if you pull what I think is a weapon, I'll kill you.
I also know good and well what human life means to me. I have killed a man and I feel bad about it, even though he was a "bad guy". That isn't to say that I regret it, only that it saddens me to have to kill anyone. I hate killing anything. I had to do a mercy killing on a dog once and cried like a bitch afterwards. I ALMOST killed a guy during OEF in the Phillipines who was about to chuck a molotov at me, but he dropped it when I drew on him.
The realization that I was prepared to kill this man brought me to tears that night as I reflected on it. You sir, may call me callous and dangerous, but I find you to be the dangerous one if you were a cop or Marine. If you were willing to put your life and the lives of innocents around you at risk in an effort to protect a criminal, then I am blessed not to have you in my fire team or patrol car.