I recently discovered a series of posts on a topic which I have covered before. You might want to give it a second look. He starts with a simple question:
I am trying to figure out why a Christian would support war or killing in any form in light of the New Testament. Can anyone make a case for war or killing in any form from the New Testament?
I wouldn’t say the whole Bible teaches non-violence, for you find Yahweh engaging in quite a bit of violence in the Old Testament. But I would say that the whole Bible clearly presents non-violence as God’s dream for humanity, and I would most certainly say this dream is realized in Jesus Christ and the Kingdom he established. So I believe that it’s incumbent upon Kingdom people to commit to refraining from violence for any reason.
And Kirk R. MacGregor:
In the course of Christian history, nowhere has the tension between the teachings of Jesus and valid application of those teachings in postbiblical socio-cultural circumstances manifested itself more clearly than surrounding the issue of violence. Stemming from the sixteenth-century divide between pro-statist Magisterial and anti-statist Radical Reformers,1 most scholarship on this issue may straightforwardly be split between “hawks”and “doves,”with each side open to the charge of reading the sacred text through the respective lenses of either the Protestant appropriation of Augustinian just war theory or the Anabaptist denouncement of the post-Constantinian alliance between church and state.2