If your parents don't teach you what you should be doing, it makes a big difference. It's all the way you are raised. The killing and violence - it all depends on your community and your parents. Parents have to instill their values on their kids. They feel rejected and lonely.
Violence is the only way they know how to get out of it.
My biggest stress in life is school. Getting into a good college is most important to me. Parents need to know everything that is going on with their kids. The main adults to influence you are your parents. I had my plastic little gun when I was a little kid, but my parents always made me aware of the dangers of guns.