Violent games don't make people killers.
I've been playing violent games since I was in highschool 1998. Mortal Kombat, Quake, Counterstrike, Unreal Tournament, GTA, etc...
I have a licensed firearm. I have a corporate job. I play sports. I grew up experiencing the pain of hangers, belts, slippers, erasers, rulers, and the sun. I went home with bruises because of fighting with bullies.
Kids today lack mental fortitude and grit. Hypersensitive and easily hurt and offended, breaks down easily.
Some people like to blame violent games. Lol. Those games gave me great hand-eye coordination, teamwork, strategy, analysis, sportsmanship, perseverance. If you've ever played the rc missions in vice city you'll know what I mean.
Those were my outlet. I shouted at my teammates and opponents in the internet cafe, at the tv. It was fun.