That's actually the way I feel about self-defense. As a Christian--and I can't separate my sense of its morality from my Christianity--I have to agree with the late missionary Nate Saint on personal self-defense: "I am prepared to meet my Maker; they are not." If I truly belief I will life after death, I have to give consideration to letting that other guy have more opportunity to know Christ (how that worked out for Nate Saint is an interesting story--it's in Wikipedia).
But I've also done wartime targeting. The law and ethic upon US military forces is that we always target military objectives, not civilians, and when civilians are unavoidable "collateral damage," we reconsider the target, and ultimately choose the weapon and shade the aim point to preserve civilian life as much as possible. Even with nuclear weapons. I did target work in the Vietnam war, when statistically it took 21 bombing attempts to destroy one target (and those other 20 bombs landed somewhere unintended), and as well for the Persian Gulf War when we employed truly smart weapons. Smart weapons are certainly better.
But I, personally, never take the stance that ending a human life is a "moral" thing. It is never ever, ever a matter of "righteousness" to be proud of, but always, always, always, always enshrouded in sin, tainted by sin, and something to regret.
Just out of curiosity do you believe in objective morality?
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