CAIRO —Mona Abdel-Rahman, 52, fled Sudan’s civil war with her six children and her mother. “Our tribe was targeted. They killed the young men and raped the girls, so we fled,” she said. After six months living in displacement, she arrived in Egypt. But she has not found the refuge she was hoping for there. For the latest news & views from every corner of the world, Worldcrunch Today is the only truly international newsletter. Sign up here. Her oldest son, Moustafa, was arrested in Giza and forcibly returned to Sudan — despite her desperate efforts to prevent his deportation. He and Abdel-Rahma…