The art of creation is older than the art of killing.
Although you may spend your life killing You will not exhaust all your foes. But if you quell your own anger your real enemy will be slain.
Anger is a killing thing: it kills the man who angers for each rage leaves him less than he had been before - it takes something from him.
This is the patent age of new inventions for killing bodies and for saving souls. All propagated with the best intentions.
I don't feel the need for religion. But I went on a yoga retreat last year and I do believe slightly in the karma thing and just being good and true unto yourself. And I slightly believe that you can attract good and bad to you.