It is moral and to kill in self defense and to protect family. But we do see examples in the first few centuries of the Church where our brethren chose martyrdom over self-defense.
I will gladly accept correction here but I don't recall any mention in the history of the first few centuries of the Church where Christian leaders or Christian communities rose up in arms to defend themselves in times of persecution. It seems to me we have the right to defend ourselves but in some cases martyrdom might be a better way. But allowing a criminal to harm or kill you does not in and of itself equal martyrdom. And there is no way I could stand by and watch a family member hurt or killed without defending them, and I am certain I would defend my own life in most circumstances. I hope I would not kill a thief who was only trying to steal my TV. I would try to stop it and be willing to use physical force, but I don’t value a TV over a human life – even the life of a thief.
I will gladly accept correction here but I don't recall any mention in the history of the first few centuries of the Church where Christian leaders or Christian communities rose up in arms to defend themselves in times of persecution. It seems to me we have the right to defend ourselves but in some cases martyrdom might be a better way. But allowing a criminal to harm or kill you does not in and of itself equal martyrdom. And there is no way I could stand by and watch a family member hurt or killed without defending them, and I am certain I would defend my own life in most circumstances. I hope I would not kill a thief who was only trying to steal my TV. I would try to stop it and be willing to use physical force, but I don’t value a TV over a human life – even the life of a thief.