You seem to be suggesting that the people most recently overwhelmed by fear and anger are going to be able to make more rational and considered decisions about the use of torture.
Well, that was not really my original intent, although I am actually prepared to defend that suggestion a little bit. My main point in all of these discussions, and I believe I have been very consistent about this, is to defend the people who used or authorized torture in the aftermath of 9/11, not to advocate for the use of torture itself. In fact, I think even the waterboarding of KSM was not morally justified at the time, although I believe reasonable people who lacked information that we have now, might have thought it was. My argument is that the people who broke the law, by authorizing or perpetrating torture at that time, were most likely normal, moral people who were trying, to the best of their ability, to do their duty to protect US citizens from further attacks, and that it does no good to vilify or punish those people. For the most part, I think the vilification is partisan politics dressed up as moral piety.
I don't think it works like that.
Well, my argument along those lines is that terrorism works by making people afraid. Random deaths caused by terrorism has a far greater destabilizing impact on society than random deaths caused by accidents or natural disasters. With time, our understanding of that fear fades. I suppose you might say that with time, our view becomes more rational because we can focus on the statistical risk of death or injury or property damage due to terrorism and put it in context, which is all that matters, but I think that is not all that matters. The fear is a big part of it.
I am reminded actually of the DC sniper attacks 2002. I had many friends who lived in the area at the time, and they were genuinely afraid to drive to a gas station or a supermarket and get out of their cars. This was an entire metropolitan area of millions of people, where civilization was severely disrupted by a two guys, a rifle, and a car with a hole in the trunk.
The problem with the purely dispassionate way of looking at things is that you might end up discounting human nature too much.