Here is some common teachings from the early church on the subject of violence.
A soldier of the civil authority must be taught not to kill men and to refuse to do so if he is commanded, and to refuse to take an oath. If he is unwilling to comply, he must be rejected for baptism. A military commander or civic magistrate must resign or be rejected. If a believer seeks to become a soldier, he must be rejected, for he has despised God.
Hippolytus of Rome (b170ad)
We who formerly used to murder one another now refrain from even making war upon our enemies.
- Justin Martyr
The new covenant that brings back peace and the law that gives life have gone forth over the whole earth, as the prophets said: For out of Zion will go forth the law, and the word of the Lord from Jerusalem; and he will instruct many people; and they will break down their swords into plowshares, and their spears into pruning hooks, and they will no longer learn to make war. These people formed their swords and war lances into plowshares, that is, into instruments used for peaceful purposes. So now, they are unaccustomed to fighting, so when they are struck, they offer also the other cheek.
Irenaeus
You see how the first christians saw Christ's words. In fact I can not see how anyone could believe anything but this after reading the New Testament.