Read Luke 22:36, for example.
It is difficult to forgive those who trespass against us. It's even more difficult to practice forbearance.
I have a good friend who is a pacifist. He says he would never use violence, even in defense of himself or someone he loves. Violence is wrong, plain and simple, in any context, according to him. My point to him is that when he, as a man, chooses not to protect someone weaker, he makes that decision for those he loves who lack the power in such situations to choose to defend themselves, and then it becomes more about "I, as a pacifist, staying pure, rather than thinking of the needs or wishes of my loved ones."