Who are the jailers?

Terry Waite asks "Were my captors worse than the Guantánamo jailers?"

Let me give a personal example. I was detained by a group of hostage takers in Beirut because they suspected me of engaging in dubious political activity. They blindfolded me and kept me in poor conditions without any contact with the outside world. They subjected me to physical and mental abuse during a lengthy period of interrogation. Had I not been able to convince them of my innocence I would not be walking free today. What is the essential difference between the methods deployed by my captors, who were labelled terrorists, and those of the authorities that detain suspects in Guantánamo Bay and elsewhere? They have been detained on suspicion and treated in a way that no civilised nation ought to condone.