I find it highly ironic that the people taking the moral stand here are the atheists:
It does not matter if it prevented some sort of attack. It is still a crime, it is still wrong, and those responsible for it deserve criminal prosecution. No amount of talk about 9/11 can change this.
“It”, is torture. Yes, it is a war crime, and the people who both did it and authorised it are war criminals. End of story.