The most violent element in society is ignorance.
I am a violent man who has learned not to be violent and regrets his violence.
Through violence you may murder the liar, but you cannot murder the lie, nor establish the truth. Through violence you may murder the hater, but you do not murder hate. In fact, violence merely increases hate. . . . Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate; only love can do that.
—Carl Sagan in Cosmos
Violence is the last refuge of the incompetent.