(Reuters) – When the boys first arrived at the Islamic State training facility in eastern Mosul they would cry and ask about their parents, who went missing when the militants rampaged through northern Iraq in 2014. But as the weeks passed they appeared to absorb the group’s ultra-hardline ideology, according to a worker at the former orphanage where they were housed. The children, aged from three to 16 and mostly Shi’ite Muslims or minority Yazidis, began referring to their own families as apostates after they were schooled in Sunni Islam by the militant fighters, he said.