Monther recalls the moment he decided to leave Syria with perfect clarity. The Syrian shop owner, who declined to provide his full name, citing threats to his security, was driving home with his sisters from the eastern city of Deir ez-Zor — a stronghold of the Islamic State group, commonly called ISIS — when members of the militant group stopped his car. The militants accused his sisters of flouting the group’s strict dress code for women. Monther spoke out. “This is not how women should be treated in Islam,” he told the men. He paid for his outburst with a public beating, receiving a sentence of 50 lashes.