Don't let them take away your peace. Remember, it's what comes out of a man's mouth that defiles him. It's what you let yourself think and say that dims the lamp of the Lord and makes the way seem dark and murky. Evil is not new. If your words are angry, your thoughts are angry. If your thoughts are angry, you're angry. If you're angry, you're afraid. If you're afraid, you lack faith and love. Out of the same mouth proceeds both blessings and cursings.
Brethren, this ought not to be.
Follow Christ's example. You can do it.
We can exact the type of justice needed without being violent as you put it. It's high time for Christians to learn from the old testament. The Bible is a wonderful teacher. Jesus did say " "Think not that I am come to send peace on earth: I came not to send [or bring] peace, but a sword."
There is righteous anger, and righteous acts that maintain the balance in this world of duality.
The point is not to be rash, hasty, or vengeful, but methodical and practical, reasonable, when we put an end to those that will shed blood to perpetuate societal mayhem.
Sometimes you have to use the sword. Just don't do it when losing you temper.