In the video that serves as his last will and testament, the youthful, well-dressed Saudi, known only as "Fatima's Fiancé," is laughing and joking with the cameraman who will record his death a few minutes later. "Pray for Allah to make my mission easy," he says, and waves as he climbs into a maroon sedan, grinning broadly. "May Allah make it easy for you," the cameraman says obligingly, and laughs. The scene cuts away to an earlier interview, where the Saudi announces that when he gets to heaven he plans to marry a woman named Fatima, who was allegedly abused...