I will kill anyone I catch sexually molesting a child. But not with rage, I will kill them like one steps on a cockroach.

I have been told by my teachers, who would be totally against me taking another life, even a cockroaches life, that to fight hatred you must not hate. The danger, extreme danger is becoming what you hate. You cannot help anyone if you cannot control and help yourself.

http://www.accesstoinsight.org/ptf/dhamma/sacca/sacca4/samma-samadhi/jhana.html

You need to let go of what is causing the rage. Many times we adults that have been molested can't remember the exact cause because we were subjected to violence every day.

So the method I literally stumbled over was vipassana meditation through the instructions from my first Dharma teacher. I wasn't looking for this meditation, my teacher saw that this particular meditation was the medicine I needed. It's not for everyone though. This method doesn't need memories or even words and logic. One just views the sensations on the surface of the body, memories are stored throughout the body, not just the brain. Body memories manifest through physical sensation which evoke mental sensation.

Just viewing physical sensation with pure awareness will burn away the roots of ones rage. This takes time and strong equanimity. Some say you need the 4th jhana for complete equanimity. Then one can fight if needed with an amazing clarity that cannot be used and abused by ones opponents.