Jesse Harasta

“Al-Wahhab allied with Muhammed bin Saud, the founder of the state of Saudi Arabia, and provided religious and ideological backing to the newly formed state.  The Wahhabi Saudi troops took advantage of the chaos of the collapse of the Ottoman Empire after World War I to seize control over the holy cities of Mecca and Medina. It’s probably safe to say that the Shia will never forgive the Wahhabis for the zealotry they pursued upon taking the cities, which included obliterating centuries-old sacred Shia shrines and claiming that they were used to worship the Imams as gods and were therefore heretical.  In the Cemetery of al-Baqi in Medina, they utterly destroyed the tombs of the Imams Hasan, Ali ibn Husayn, Muhammed ibn Ali, and Jafar, as well as the tomb of Fatima, the daughter of Muhammad.  In Mecca, they destroyed the Cemetery of Mualla, where the ancestors of Muhammad and his first wife Khadija were buried.  These prominent destructions were part of a pattern of violence that witnessed the Wahhabi Saudis smash buildings, tombs and mosques associated with the history of the Prophet and his family and which were venerated by Shia.  In addition, they alienated Shia from governance and oppressed them throughout the kingdom[26].  This vandalism has been repeated time and time again by Wahhabis in other areas as well, including the much-publicized destruction of the Buddha statues of the Bamiyan Valley of Afghanistan by the Taliban in 2001[27] and the outbreak of violence in 2013 around the city of Timbuktu, where Wahhabi fundamentalists  destroyed holy artifacts and burned a priceless library of manuscripts before fleeing the arrival of French troops[28]. While the establishment of the Wahhabi school of thought created an intellectual form of anti-Shia ideology, it is probable that this philosophy would have remained isolated in the political backwater of the Nejd Sultanate (the core of modern Saudi Arabia) if not for the fall of the Ottoman Empire and the final abolition of the Caliphate. The Ottomans had claimed to be Caliphs of the Muslim world since 1453, the same year that they conquered Constantinople (Istanbul) from the Byzantine Empire, and they ruled over a considerable portion of the world's Sunnis, as well as the shrine cities of Mecca, Medina and Jerusalem.  After 1876, the Sultans had placed particular emphasis on their role as Caliphs in order to bolster their global position by asserting their Empire's "Muslim” character, and while this was never universally accepted by all Sunnis or Shias, Sunni Muslims everywhere at least could say that there was a government that claimed to represent the form of rule established by the Prophet and that provided legitimacy and continuity.”
― Jesse Harasta, The History of the Sunni and Shia Split: Understanding the Divisions within Islam