“....declared its chief Abu Bakr al-Baghdadi “the caliph” and “leader for Muslims everywhere.”
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Watch out — there are plenty of “peaceful” American Muslims who will acknowledge that proclamation.
As Caliph he is both Emperor and Pope to all Islamic people. If he gives the call—they will rise up to serve him. But, by doing this he has locked himself into a war with Iran and Russia. He may well urge the people to rise up and slay the Royal Saudi Family and seize Mecca!