One morning in January, Kefayat Ullah walked to his school in southern Bangladesh, just as he had done most days over the past six years. Kefayat had always been one of the top students in his class. But on this day, the 16-year-old was told he had been expelled. The school’s headmaster told him that he and more than 60 of his classmates were no longer permitted to attend school. The reason? A government investigation had identified them as Rohingya refugees. We went back home crying, Kefayat said.