What does the policy of most nations have to do with it? I personally hold the US to a higher standard because of our size and technological sophistication. We could annihilate any country on the face of the Earth--but for what? To prove we are the sheriff of the town? The fact of the matter is that we have the technological sophistication to respond to a nuclear attack in a precise way--moreso than any other country--that does NOT require nuclear weapons. It would be an utter shame if we retaliated with nuclear weapons--an utter shame.
I am FOR self-defense, but I am not for unmeasured self-defense.
If the US was hit by a nuclear strike by any country, it would have to respond in kind otherwise it may embolden other enemies to do the same in the future.
A civilian does not even compare. There is functionally no difference between a civilian of an enemy country and a civilian of your own country.
This is patently untrue. A civilian of an enemy country will likely contribute to the war effort of the enemy by paying taxes, building weapons, ect. A civilian of your own country will not be contributing to the war effort of your enemy (unless they are a spy in which case they should be tried for treason and executed).
The only reason to kill a civilian of an enemy country is to satisfy an aggressive urge in a way achieves maximum cognitive dissonance (after all, THEY were not like YOU, and they were surely plotting your death!)
Also untrue. I can think of at least three rational reasons (depending on the context) to kill civilians of an enemy country:
-Civilians are needed in order to support the war effort. Killing civilians reduces the enemy's capacity to wage war.
-Killing civilians may reduce the enemy's will to wage war, perhaps hastening surrender and saving more lives than otherwise would have been lost.
-In the context of a retaliation in kind from a nuclear strike, it would serve as a deterrent to others who might try it.