There are several passages in the New Testament like Matthew 5:38-39:
You have heard that it was said, "Eye for eye, and tooth for tooth." But I tell you, do not resist an evil person. If anyone slaps you on the right cheek, turn to them the other cheek also.
And also Romans 13:1-2:
Let everyone be subject to the governing authorities, for there is no authority except that which God has established. The authorities that exist have been established by God. Consequently, whoever rebels against the authority is rebelling against what God has instituted, and those who do so will bring judgment on themselves.
Do these -or any other passages in the New Testament - condone violence of any sort? (In self defense, a government/social revolution, defending an attacking army, et cetera). If there are none, then are these verses suggesting the New Testament is opposed to a person (or country) acting in self defense?
I am aware of times in the Old Testament where God instructs Israel to go to war, and I know people who will say that violence as self-defense is acceptable, but I'm curious if anything like this is ever stated or implied in the New Testament?