Local people are also quoted as saying that followers of Sufism, or Islamic mysticism, regularly gathered at the mosque. Islamist jihadist groups, including so-called Islamic State (IS), see Sufis as heretics. IN PIC: Relatives of Sheikh Sulieman Ghanem, 75, center, surround him as he receives medical treatment at Suez Canal University hospital in Ismailia, Egypt. (Photo | AP)