War

I get really confused when talking about war and my faith. When I read through the Gospels I come to the conclusion that we should be pacifists. When I look at the realities of this world I think war is necessary. I look at Acts 1:8 and I see we are to be witnesses. Maybe being a pacifists is part of the witness we need to be to this world of a wholly different way, a wholly different Kingdom, and a wholly different God. This Kingdom way of living we live is completely different than this world, or at least it should be, so why don't we just become comfortable with that and be that witness of wholly different way serving in a wholly different Kingdom with a wholly different God?