"I say to you ... (I have) tasted the bitterness of American brutality: my favorite wife's chest was crushed by a concrete ceiling."
"Al-Qaida is at war. And not just against the West, but with itself...
"It's very profound in the radical edge of it," says Wright, who explores the ideological rift for an article in next week's New Yorker magazine. "Before, moderate Muslims have spoken out against violence in the name of Islam, but now radicals are doing the same thing. And what's fascinating is that they're attacking on two grounds: One is that [violence is] not practical because it hasn't achieved their purposes. And secondly, it's sinful. It is placing the souls of the people who commit this violence in great jeopardy."
Wright tells NPR's Guy Raz that the two players behind the rift are Ayman Al-Zawahiri, al-Qaida's No. 2 man, and Sayyed Imam Al-Sharif, also known as Dr. Fadl. Sharif, who wrote al-Qaida's manual for jihad training, recently released a manifesto refuting those principles. The fact that al-Qaida's architect has changed his mind, Wright says, makes violence "harder to justify using that kind of thinking."