Their particular animus toward the Sufi practice involves the tradition of visiting the graves of holy figures. The act of praying to saints and worshiping at their tombs is an example of what extremists refer to as “shirk,” or polytheism, according to Brill’s Encyclopedia of Islam.
“Shirk literally means association. It is the act of associating God with other entities,” said Jacob Olidort, a scholar of Islam, a foreign policy adviser to Senator Orrin Hatch and the author of several reports for the Brookings Institution on these and other concepts. “What they take the Sufis to task principally for is the intercession, the use of other media, to access God, rather than going directly.”
Alexander Knysh, the author of two studies of Sufism and a professor of Islamic Studies at the University of Michigan in Ann Arbor, agreed. “They believe Sufi shrines are the most egregious expression of that shirk,” he said. “You are turning to a mediator, who is inserting himself between the believer and God, and in this way it becomes a kind of idol.”
Sufis venerate mystics, who in their lifetime were seen as close to the divine. They bring votive gifts to their graves, like rose water or rose petals. Merchants heading on long voyages will come and make an offering, promising to make another if their venture is successful, Mr. Knysh said.
Sufis, he said, are monotheistic and, to them, the practice does not supplant or create an equal to God. But hard-liners don’t see it this way, and instead see Sufis as “grave worshipers.”
The debate over what constitutes idolatry in the Muslim faith is centuries old. In the early 1800s, fundamentalists in Saudi Arabia went so far as to try to blow up the tomb of the Prophet Muhammad, Mr. Knysh said.
The notion of who is and isn’t Muslim has also occupied numerous Qaeda theologians, long before the rise of the Islamic State. While the older terrorist group also holds Sufis to be heretics, Al Qaeda’s official branches have been more restrained in its violence. When Qaeda fighters in northern Mali destroyed the tombs of Sufi saints in Timbuktu, the group’s emir in the region sent them a multipage reprimand, warning that even though they were correct in principle, their actions could inflame Muslim sentiment against them.
One of the ways the Islamic State has departed from Al Qaeda and its official affiliates has been its willingness to use unbridled violence against Muslims they accuse of straying, including Shias and Sufis. In addition to the attack on the shrine in Pakistan in February, the Islamic State bombed a Sufi place of worship in Baluchistan in 2016, and has carried out targeted assassinations of Sufi clerics, including in Egypt.
The Islamic State’s own publication made clear as far back as 11 months ago that it considered Sufism to be one of the main “diseases” it aimed to treat in Egypt. Rawda, the district where Friday’s attack occurred, was mentioned as an area where it planned to “eradicate” Sufi beliefs.
In a question-and-answer with the Islamic State’s magazine Rumiyah, the emir of the group’s religious police in the area said: “Our main focus, however, is to wage war against the manifestations of shirk and bid’ah, including Sufism,” using the word bid’ah to describe heresy.
He goes on to say that “shirk has become very widespread” in the area, and outlines the main Sufi traditions in the region, calling it a “disaster.”
“The Sufis believe that the dead have the power to bring about harm and benefit. Hence they direct various types of worship toward the dead,” he said. “They also claim that the dead are intermediaries between them and Allah, just as human kings have intermediaries between themselves and their subjects.”
The article includes images of a Sufi prayer hall in Sinai, and a photo of an old man kneeling as an Islamic State militant lowers a blade over his neck. He is identified in the photograph as Abu Hiraz, a Sufi cleric, who according to news reports was abducted in front of his home in late 2016.
In the article, the Islamic State acknowledged abducting the elderly man, who they say was sentenced to death because of his embrace of polytheism.
They also issued a warning to other Sufis living in Egypt, saying they were “mushrikin” and that their “blood is filthy and permissible to shed.”