But Peter did get killed eventually --- he was executed in Rome. He did not fight back. As we read in the NT, Stephen was killed. He did not defend himself, nor did others defend him. James the head of the Church in Jerusalem was killed. He did not defend himself, nor did the others defend him. Saul of Tarsus was riding from city to city with is posse arresting and imprisoning innocent, blameless Christians and even having them killed, and they did not resist nor did they arm to defend themselves. Did they? There seems to be some kind of principle in practice here.
That's all I'm saying.