ISIS is only one small part of a larger Sunni revolt in Iraq that sectarian groups have been preparing for years, according to Iraq's exiled Vice President Tariq al-Hashimi. And defeating ISIS won't stop the greater battle.

"We shouldn't look at this development of ISIS as apart from the uprising of the Arab Sunni provinces over two years," Hashimi told The Daily Beast in an interview from Turkey, where he has been living since the government of Nouri al-Maliki purged him in 2012 by indicting him on murder charges, then convicting him in abstentia.

"The provinces have done a peaceful Sunni revolt against the oppression, the injustice, the inhuman conditions the Arab Sunnis have been suffering for years," he said.