The perpetrator was a liberal activist and decorated campus Muslim leader who said American Sniper promoted violence.Is the University of Michigan a hostile place for Muslim students—or just a hostile place for freethinkers? Zeinab Khalil, a recent UM graduate, Muslim, and progressive activist who won numerous distinctions during her time on campus, including an award named for Martin Luther King, Jr., thinks it’s the former. A UM group’s decision to screen the film American Sniper offended the sensibilities of some Muslims, including Khalil, who claimed on Twitter that the campus “is already a hostile place for Arab/Muslim students. In one...