Forgive the long quote. This is a must read,
The theological justification for al Qaeda's wholesale slaughter of civilians was provided by Sayyid Imam al-Sharif, also known as Dr. Fadl, one of the founding fathers of al Qaeda. Because the murder of innocents is forbidden in Islam and the murder of Muslims in particular, Ayman al-Zawahiri and Osama bin Laden required some sort of theological framework for justifying terrorism. This was provided by al-Sharif, who essentially argued in his book, "The Compendium of the Pursuit of Divine Knowledge," that apostates could be murdered, and that approach, takfir (which has come to be known as takfirism) allowed al Qaeda to, for all intents and purposes, kill anyone they wanted without violating the laws of Islam by declaring them to be apostates. In other words, Dr. Fadl helped provided a theological justification for something that everyone involved knew was wrong.There is much more, so again, I commend you to read the whole post. As I told a conservative friend last year, history will condemn Bush administration for their use of torture. Adam concluded "...while those who stained America's honor with war crimes have escaped accountability for now, these American takfiris will eventually be judged by history with a clarity we cannot muster today. The arc of the universe is long...you know, all that stuff."
The legal memos justifying torture aren't very different in terms of reasoning--it's clear that John Yoo and his cohorts in the Office of Legal Counsel saw their job not as binding the president to the rule of law, but to declare legal any tactic that the executive branch believed necessary to fight terrorism....
The torture memos--indeed, all of the pro-torture arguments rest on a similar intellectual themes to the takfiris. Suspected terrorists are "illegal enemy combatants", outside the framework of laws that would otherwise guide us. Just as the takfiris justify the killing of even self-identified Muslims by excommunicating them as "infidels", torture apologists argue that even American citizens like Jose Padilla who are accused of being terrorists become legal "apostates" without any rights the president is bound to respect. These are extraordinary circumstances, this is an extraordinary war--and so, the Bush administration turned to Yoo, a man who believes the president is bound by no laws during wartime: