Have to disagree.
One, these are not US citizens randomly picked up off the street. These are war criminals with specific, actionable information. We are at war.
Second, ever been waterboarded? I would not call it torture. No long term negative effects and certainly not the same as say, having bamboo shoved under your fingernails or your arms broken and twisted behind your back. Many of our troops have been exposed to waterboarding and other techniques. Ever heard of SERE training?