I would recommend reading "On Killing" by Lt. Colonel Grossmen. I think there is a disconnect between the violence we see and the reality of actual violence.
In the beginning of the book he makes on interesting point. I would ask how many of you have ever really killed an animal for food? We did some on the farm, but mostly I witnessed the result of coyote attacks on our sheep. Later, between my eight and ninth grade year, I worked putting in a large scale freezer unit for a rural meat packing plant. The reality and the gravity of being around actual slaughter brings about a sense of revulsion and guilt. It is not something done lightly. I threw up the first time I shot a bird when I was a kid and that put me off hunting for a long while.
I haven't finished the book yet, and there are parts that I am unsure about, but regardless, it's worth the effort to read.