13 Everyone must submit to governing authorities. For all authority comes from God, and those in positions of authority have been placed there by God. 2 So anyone who rebels against authority is rebelling against what God has instituted, and they will be punished. 3 For the authorities do not strike fear in people who are doing right, but in those who are doing wrong. Would you like to live without fear of the authorities? Do what is right, and they will honor you. 4 The authorities are God’s servants, sent for your good. But if you are doing wrong, of course you should be afraid, for they have the power to punish you. They are God’s servants, sent for the very purpose of punishing those who do what is wrong. 5 So you must submit to them, not only to avoid punishment, but also to keep a clear conscience.
Just as government has police, it also must protect its citizens with an Army. And this was said of a Roman soldier:
“10 In Caesarea there lived a Roman army officer named Cornelius, who was a captain of the Italian Regiment. 2 He was a devout, God-fearing man, as was everyone in his household. He gave generously to the poor and prayed regularly to God.”
I also find it interesting that you want to limit things to the New Testament. Is the Old Testament not the Word of God? Was King David not a man after God’s heart?
To pretend God calls us to run around shouting “Peace! Peace!” is to ignore the scriptures and the role God requires government to play. And history shows many examples of when war did wonderful things - like free Europe from the Nazis, kept South Korea free, liberated Iraq, ended slavery in the USA, etc.
So you are saying the New Testament is NOT the Word of God?