The Kingdom and the Caliphate: Duel of the Islamic States. Carnegie Endowment for International Peace. Cole Bunzel. February 18, 2016.
Since late 2014 the Islamic State has declared war on Saudi Arabia and launched a series of terrorist attacks on Saudi soil intended to start an uprising. In a further attack on the Saudi kingdom, the self-declared caliphate has claimed to be the true representative of the severe form of Islam indigenous to Saudi Arabia, Wahhabism. These two very different versions of an Islamic state are at war over a shared religious heritage and territory. [Note: contains copyrighted material].
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