Greenwald provides context:
John Yoo's Memorandum, as intended, directly led to -- caused -- a whole series of war crimes at both Guantanamo and in Iraq. The reason such a relatively low-level DOJ official was able to issue such influential and extraordinary opinions was because he was working directly with, and at the behest of, the two most important legal officials in the administration: George Bush's White House counsel, Alberto Gonzales, and Dick Cheney's counsel (and current Chief of Staff) David Addington. Together, they deliberately created and authorized a regime of torture and other brutal interrogation methods that are, by all measures, very serious war crimes.[...]
While Yoo's specific Torture Memos were ultimately rescinded by subsequent DOJ officials -- primarily Jack Goldsmith -- the underlying theories of omnipotent executive power remain largely in place. The administration continues to embrace precisely these same theories to assert that it has the power to violate a whole array of laws -- from our nation's spying and surveillance statutes to countless Congressional oversight requirements -- and to detain even U.S. citizens, detained on American soil, as "enemy combatants." So for all of the dramatic outrage that this Yoo memo will generate for a day or so, the general framework on which it rests, despite being weakened by the Supreme Court in Hamdan, is the one under which we continue to live, without much protest or objection.