The November 24, 2017 attack on al-Rawda mosque in Bir al-Abed in the northern part of the Sinai Peninsula, apparently by Wilayat Sinai, a proxy of the Islamic State (ISIS) in Egypt, was the most deadly terrorist attack Egypt has ever known, killing more than 300 civilians and wounding over 100. Beyond the unusual scope of casualties, it was also unusual in its target: Salafi jihadist Sunnis massacring Sunni worshippers of the Sufi branch of Islam. Along with the profound shock felt in Egypt since the attack is the question whether Egypt’s overall policy on terrorism will now change, or if the Egyptian regime, which tends to view Sinai as the state’s backyard, will make do with a routine military response, i.e., aerial bombings, symbolic beefing up of forces, and a harsher stance toward the local population suspected of cooperation with Wilayat Sinai.