You’re presuming in this instance, that America had full and reliable knowledge about the scenario and how it would inevitably unfold. If a military planner makes a strategy from hypothetical circumstances (informed or not), he makes untested and unverifiable assumptions about the enemy’s psychology and power. We might not see this in our Hollywood understanding of war, but that’s just how it is (Yoder, 1992). War is not so predictably mechanical. I grant that a military think-tank does have some (or much) intel, but I don’t think this makes war justifiable. As it were, the Nazi Germany war-economy, by this time, had become largely impoverished and morale was certainly weak, even at the top of the power pyramid. Was it foreseeably guaranteed to stop the war? Was it right to stop one holocaust, with another? And to shed that blood personally and directly?
We just cannot forget that Nazi Germany’s ability to go to war, was largely dependent on her people, just as much as America or anyone else. Grossly manipulated or not, it is the people (generally the uneducated and impoverished classes), who have to actually fight them. Everyone complies because there is a peculiar consensus that it is morally noble to shed blood for something greater. As for myself, I don’t want a part of that ungodly war machine and I choose to serve as priest and prophet for the Kingdom of God.
There are a few thing to say about this, but I’m waiting on an invitation by stuartd to participate in his similar dilemma. I’m not sure whether it’s the same engineered question he spoke of previously. (Stuartd? Would you like me to respond to this?) Many of your concerns would probably be addressed there. If I’m not invited, I will respond to your scenario here.
The beauty of this example is that it largely answers your own question. You and I, as children of wrath, were going to be on that cross. Christ didn’t just stand by and watch. He actively offered up his life for us. But it also gets a lot richer than that: He did this while we (these children) actually participated in the violence. So I agree that not saving those you can save is abhorrent. But I prefer to follow Christ’s example in doing so by offering up my life.
Then after every natural, creative alternative, both reactive and proactive, has been exhausted, we rely on supernatural providence. (I don’t think this is generally done by those who remain adamant that violence is justified as the option). Finally, we freely give up our life. There is nothing else God can expect us to do.