Islam in the Ottoman Empire
Islam was the official religion of the Ottoman Empire. The highest position in Islam, "caliphate", was claimed by the sultan, after the defeat of the Mamluks which was established as Ottoman Caliphate. The Sultan was to be a devout Muslim and was given the literal authority of the Caliph. Additionally, Sunni clerics had tremendous influence over government and their authority was central to the regulation of the economy. Despite all this, the Sultan also had a right to decree, enforcing a code called Kanun (law) in Turkish. Additionally, there was a supreme clerical position called the Sheykhulislam ("Sheykh of Islam" in Arabic). Minorities, particularly Christians and Jews but also some others, were mandated to pay the jizya, the poll tax as mandated by traditional Islam.
Shakib Arslan
Influenced by the ideas of al-Afghani and Muhammad Abduh, Arslan became a strong supporter of the Pan-Islamic policies of Abdul Hamid II. He also advocated the proposition that the survival of the Ottoman Empire was the only guarantee against the division of the ummah and its occupation by the European imperial powers. To Arslan, Ottomanism and Islam were closely bound together and the reform of Islam would naturally lead to the revival of the Ottoman Empire.