Why aren't more Christians also Pacificsts?

Christ commanded us to turn the other cheek, so why don't we? Why do we support initiating war? I understand protecting our loved ones, but should we be on the offensive? Furthermore, if the attack is geared toward us specifically, why do we defend? Wouldn't it be more "Christ-like" to simply surrender and allow wickedness to be rebuked by it's own actions rather than my own "Christian-violence"? It seems as though we Christians are among some of the most patriotic people and we interpret that to mean that we should enlist in the armed forces. Can we really envision Christ with a machine gun if we're honest? Hmmmm....seems like an oxymoron. I know that this question has potential to piss many of my fellow Christians that are enlisted in the armed forces, but I'm willing to take the chance to get an honest answer. I'm not undermining bravery, just how we do it. Wouldn't being "peace-keepers" be more beneficial in the long run?