Nah. I think it works like this: Torture is illegal, but there are occations where we think it is supposed to be permitted. This means that the illegal torture is necessary, but we do not support breaking the law, so necessary torture is legal. Therefore, no illegal torture is sanctioned and will not happen either. Simple.

The amoral people are the ones who do illegal deeds because it is necessary, knowing at the same time that they are illegal deeds. They will be punished, and will probably have their impurity burned out in the lake of fire also. That's like "justice for all", or something.