You can’t find a better manual on how to make people hate you than Tony Lagouranis’s description of how he tortured people in Iraq when he was in the US Army. An excerpt from John Conroy’s article on Lagouranis:
The warrant officer secured a shipping container that became the unit’s interrogation booth. Stress positions became standard operating procedure. They included standing for long periods; kneeling on concrete, gravel, or plywood; and crawling across gravel. “Another one we’d use was where they would have their back against the wall and their knees bent at right angles. We used to do that as an exercise in basic training and it gets real painful after a few minutes, but we’d make the prisoners do that for a long time.