GALKAYO, Somalia — The three masked gunmen burst into Asha Muse Ali's tent at night and grabbed every item of value they could find: $85 in cash, a cell phone and a gold ring. Then the attackers embarked on a crime that carries a severe social stigma in this conservative Muslim country: They raped Ali and her aunt. Ali and her family are among almost 60,000 internally displaced people in the central Somali town of Galkayo, where hundreds of families have sought refuge from violence in Mogadishu and in south-central Somalia.