Khamenei ventured that the slain devotees, including many Iranian nationals, lost their lives either because of Saudi complicity or incompetence. (He errs toward the former.)
"Saudi rulers ... who have blocked the proud and faithful Iranian pilgrims' path to the Beloved's House, are disgraced and misguided people who think their survival on the throne of oppression is dependent on defending the arrogant powers of the world, on alliances with Zionism and the U.S.," Khamenei said in a statement posted on his official website Monday.
"The world of Islam, including Muslim governments and peoples, must familiarize themselves with the Saudi rulers and correctly understand their blasphemous, faithless, dependent and materialistic nature," the statement went on, asserting that the kingdom's rulers were unfit to be the custodians of Islam's holiest sites: "Because of these rulers’ oppressive behavior towards God’s guests, the world of Islam must fundamentally reconsider the management of the two holy places and the issue of hajj."
A day later, Saudi Arabia's top cleric, Grand Mufti Abdulaziz Al Sheikh, fired back, dismissing Khamenei's criticism as a feature of supposed Iranian hatred toward Sunnis. Iran's theocratic regime sees itself as the vanguard of Shia Islam, similar to how the Saudis, practitioners of a particular orthodox Wahabist brand of the faith, style themselves as the leaders of the Sunni world.
The grand mufti pointed to the pre-Islamic history of what's now Iran, where the bulk of population were once monotheistic Zoroastrians, and suggested that this ancient legacy still shadowed the present.
"We must understand they are not Muslims, for they are the descendants of Majuws" — a term for Zoroastrians — "and their enmity toward Muslims, especially the Sunnis, is very old," he said.
Iranian Foreign Minister Javad Zarif responded to Al Sheikh's remarks with a tweet, linking Saudi Wahabism to the fundamentalist terrorism of the moment.
But the Saudis themselves cast the Iranians as international pariahs, bent on fomenting armed struggle and terrorist plots around the world. Zarif's Saudi counterpart, Adel al-Jubeir, said in a speech last week that the regime in Tehran "is behind some of the operations threatening national security of the region."
He added: "We wish from Iran, a great nation with great history and great people, to be able to change its policies which it built in 1979 so it can be a new member in the international community, weaving new policies with it."