Rhetoric escalates between regional rivals Riyadh and Tehran over 2015 Hajj tragedy and this year’s pilgrimage. Pilgrims circle the Kaaba at the Grand Mosque in Mecca on September 4 [Ahmed Jadallah/Reuers] Saudi Arabia’s grand mufti has said Tehran’s leaders are “not Muslims”, a day after Iran’s supreme leader Ayatollah Ali Khamenei accused Saudi authorities of being responsible for the deaths of