We live today in the Church Age, where Jesus commanded we ,"Turn the Other cheek". And "To love your enemies,....and pray for them ".
Having said that I know doing so is much easier than saying. I myself have taken a vow of non violence but that is not something everyone can do.
You're also right that when Christ returns he will indeed have a sword and will definitely be of the mind for some gratuitous killing. But I think you're probably forgetting that will happen after the end of the Church Age.
At that time the world will revert back to days like unto before the Church Age.
Remember, The Church Age began when the Holy Spirit was given to live INSIDE man. But with the Last Trump, the Trumpet of God will sound.....
1st Corinthians 15:52
And just like that, "He who restrains....will be taken out of the way " 2nd Thessalonians 2:7
Also let us not forget it was because of violence that God flooded the Earth.
This should tell us what he thinks of violence.