(Reuters) – Hatf Saiful Rasul was 11 years old when he told his father, a convicted Islamic militant, that he wanted to leave school and go to Syria to fight for Islamic State. The boy was visiting his father in a maximum security prison during a break from Ibnu Mas‘ud, his Islamic boarding school, Syaiful Anam said in a 12,000 word essay on his son and religion that was published online.