I am a Christian Pacifist, but I'm also Lutheran, which has in its doctrines acceptance of Just War Theory. This does not mean that all Lutheran congregations support war in general or particular wars in particular, but simply that it can, and some do. The church I attend (because it is my wife's church) is rather pro-war, in my opinion.
But I've been loathe to leave Lutheranism because of my understanding of the sacraments: I share with Lutherans (though not Lutherans exclusively) similar belief of the meaning and understanding of Baptism and Communion. The historic peace churches have a different theological belief. And the sacraments are for me very important.
But I feel I may be reaching a point that Christ's message of peace transcends for me the meaning of the sacraments. I don't want to be a part of a church where it is open for debate whether one should support a war or not. I want to be a part of a church which proclaims a message of peace, and a part of a group that takes action for peace.
In my ideal, I'll become half-Lutheran, half-Quaker. My wife and child (and future children) would be members of a Lutheran congregation, and I could still attend with them part of the time to receive the sacrament. But I would attend Quaker meetings, and participate in Quaker actions. I'm not sure that's entirely possible.
I'm sharing this as a part of life in ideas. In "Human Morality and Animal Research: Confessions and Quandaries," Harold Herzog refers to animal rights activists as "people who change their lives because of an idea." I am one of those people: I have changed my life for an idea, becoming a vegetarian. Because of an idea, there are concrete changes in my daily meals, my social interactions, and my purchasing decisions. Ideas are for me not abstract concepts: they are guiding forces in concrete, real behavior (which might be why I am drawn to Dostoevsky, whose characters are so radically motivated by ideas).
And now an idea, an understanding of Christ's peace message, has been guiding another change in my life. For me, Christian pacifism needs to go beyond merely saying "I am a pacifist," for in day to day life in middle America, the pacifist and non-pacifist may not behave terribly differently (though I've tried to take pacifism deeper than opposition to violence, and into forgiveness of trespasses, respect for the dignity of all creatures in other ways, and avoidance of conflict). I want to join a peace church, and be a part of a peace community that proclaims peace to the world.