A bloody past and centuries of mistrust between two branches of Islam are threatening to derail Iraq’s bid to crush ISIS — as well as the American war plan.
The rise of Iran-backed Shiite militias battling the extremists has left the country’s Sunni minority wondering what to do next.
The so-called Popular Mobilization Units made up primarily of Shiites aligned with Tehran have taken on a kind of semi-official status in Iraq’s security forces, fighting at the tip of the spear during recent anti-ISIS campaigns in the cities of Tikrit and Ramadi. In some cases, they are led by men accused by the U.S. of being responsible for attacks on Americans.
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But Sunni fighters are expressing dismay at the idea of being stationed with Shiites, even if both parties share a common enemy in ISIS.









