I had read in Time or Newsweek or one of those mags back when the Shia-Sunni war was raging in Iraq that one of the last straws for the Iraqi Sunni with al Qaeda was when the Qaeda guys demanded Iraqi wives from the Sunni leaders in return for their services as "Iraq's protectors".
The Sunni tribal chiefs basically turned on al Qaeda at that point; they withdrew their lodging, withdrew intel and support, and starting snitching al Qaeda out to US Special Forces for cash.