Mr. Meyer, I submit that your scenario is unnecessarily convoluted and far-fetched, whereas your comment:
Is torture acceptable to expedite the goals of the state?
is too simplistic.
Since you are posting on a gun-related forum, it's reasonable to assume you are a gun owner. Further, it's reasonable to assume that at least one reason why you own a gun is for self-defense. So if an armed BG enters your home and threatens you and/or your family with death or serious bodily injury, would you shoot him? Or would you refuse to shoot him because you don't want to be like him in using a gun in a violent manner?
There is a difference between murder and killing. All societies have recognized this difference, including our current legal system. Intent matters.
There is a difference between a BG who uses weapons as a practice to further his aims, and a person who uses weapons as an urgently necessary means of preventing BGs from achieving their aims. A difference of intent exists between the BG and the protector. Again, intent matters.
I do not favor torture for non-urgent situations. However, given a more reasonable scenario, torture may well be appropriate. If the situation existed that we had captured a known terrorist, and we had reason to believe that he knew of a WMD or ambush that would soon kill hundreds, thousands, or hundreds of thousands of people, I believe it is our duty to do what must be done to thwart the terrorists' plans. Torture may not get you the information you need, but if the situation is urgent with hundreds of lives or more in the balance, and torture is the only option or the option most likely to get the information you need, it should be done. To discard the option simply because it isn't perfect is illogical. If perfection is your standard, you won't find it in this world.
We abdicate our responsibilities to innocents when we avoid taking necessary actions to save them simply because we draw a false comparison between ourselves and murderers.
Using a gun to defend myself does not make me the same as the BG who uses a gun to harm innocent people. Using torture in urgent circumstances involving hundreds of lives does not make us the same as those who use torture on a routine basis.
Anyone who believes that using torture for such urgent situations is the same as using torture as a regular practice should not own guns for self-defense, nor should they associate with people who own or use guns for self-defense, including law enforcement.