It's true that there have been incidents that suspects have been put through torture that they were completely undeserving of, but it's very hard to imagine that this is the norm. Some people do these jobs because they get sick thrills out of certain parts, but for a majority of people using enhanced interrogation techniques is NOT and enjoyable experience.
Yes, abuse of enhanced interrogation should be attributed to bad apples, because most of the people who protect us through the CIA and the FBI are good people, just trying to do their jobs. With true enemy combatants, there really are few ways that enhanced interrogation techniques can be abused. The techniques protect American lives.
The abuse of enhanced interrogation techniques are not because of bad apples. What they have to do with is the government trying to do everything it can to protect its people. A bad apple implies one bad in a large group of good but today that is just no longer the case.
Interrogation in the aftermath of 9/11 was very complicated, and looking back on the whole situation and logic is hard to really understand as a whole. There was, from what I've read, almost definitely a culture that developed that made the interrogations tolerable, although the nature of enhanced interrogations vs. torture is hard to define.
When the Homeland Security Act was introduced shortly after 9/11, it gave interrogators carte blanche to go to whatever extremes necessary to gather information if it is for the good of the nation. It is, therefore, hard to believe that those who abuse the privilege of enhanced interrogation techniques are merely bad apples when they've been granted executive level permission to do so.
The abuse of enhanced interrogation should not be attributed to bad apples. We can not blame a few bad apples for the abuse of enhanced interrogation because they were allowed to carry it out. We should be blaming the person who allowed them to push it as far as they did.
Acceptable interrogation techniques are outlined in the Geneva Convention. The abuse of enhanced interrogation, with the United States military and agencies should not be attributed to bad apple or people that were unfit for the jobs. During the Bush administration it has become painfully clear that the United States used torture and other methods that are not allowed in the Geneva Convention and some of these, "bad apples," were simply following orders from people above them.