I think we are afforded the luxury to ask questions like this because of the sacrifice previous generations made. We are also seperated from violence by a great distance and protected from harm due to our military might.
Please imagine you are living in an ancient city-state and a large horde of invaders were riding hard thru your gates. By the time you typed your post someone would have lopped off your head. Raped your wife and then murdered her and your kids.
Now if that is acceptable to you, and you still feel you would be a pacifist then I respect you as a man who would stick to his principles,though I don't share your principles.
If however you would fight in that situation to protect yourself and your family and neighbors, would you fight if you had a chance to meet the invaders a mile out?
How about 5 miles out? 50? 1,000? Would you go 5,000 miles to protect your neighbors? Or do you not consider people that far to be your neighbors.
My point is the only difference between fighting an army marching down your street and fighting one overseas is distance and what affect should distance have on the answer to your question.
I'm leaving out the issue of whether or not you agree politically with the conflict and am assuming we are talking about all conflicts including ones where you and your family will probably die or worse if you do not fight and win. I make this assumption to mete out the real issue of to fight or not.
I took a peaceful approach as a JW but now have returned to my previous position of I will fight to protect my family and neighbors no matter where they be. If I cannot personally fight I will support those who do. It was in fact an easy thing to do. I knew I would fight here at home and could not allow someone to harm my family and friends. From there it was easy to reason that distance should not affect that position.
I cannot regulate the wars my country fights except thru the democratic process. I am one man. If there is a God then it is his responsibility to manage those affairs if they displease him. I do believe the Bible states that the governments are serving as his ministers until he decides to take action so who am I to argue with the ministers of God.