The terror group offers Christians and Yazidis a choice: convert to Islam or die. Those who refuse, including children, are sometimes crucified. Or beheaded.
From the Minneapolis Star Tribune:
A former Minnesotan who graduated from Robbinsdale Cooper High School was killed in Syria last weekend, the first American to die fighting for the terror group that calls itself the Islamic State of Iraq and al-Sham (ISIL).
Douglas McAuthur McCain's death is one of the first clues that U.S. officials have as they try to identify the Americans who have joined a group that has vowed to remake the Middle East. And his death is evidence that ISIL is willing to use Americans on the battlefield rather than sending them back to the United States to launch attacks.