Kadızadelis (also Qādīzādali) were a seventeenth-century puritanical reformist religious movement in the Ottoman Empire who followed Kadızade Mehmed (1582-1635), a revivalist Islamic preacher. Kadızade and his followers were determined rivals of Sufism and popular religion. They condemned many of the Ottoman practices that Kadızade felt were bidʻah "non-Islamic innovations", and passionately supported "reviving the beliefs and practices of the first Muslim generation in the first/seventh century" ("enjoining good and forbidding wrong"). Driven by zealous and fiery rhetoric, Kadızade Mehmed was able to inspire many followers to join in his cause and rid themselves of any and all corruption found inside of the Ottoman Empire. Leaders of the movement held official positions as preachers in the major mosques of Baghdad, and "combined popular followings with support from within the Ottoman state apparatus". Between 1630 and 1680 there were many violent quarrels that occurred between the Kadızadelis and those that they disapproved of. As the movement progressed, activists became "increasingly violent" and Kadızadelis were known to enter "mosques, tekkes and Ottoman coffeehouses in order to mete out punishments to those contravening their version of orthodoxy." Origin Kadızade Mehmed In 1582, Kadızade was born to the son of a provincial judge in the western Anatolian town of Balıkesir. In his hometown, Kadızade studied the learned disciplines of the distinguished fundamentalist theologian Muhammad Birgivi (died 1573), who has been called "the inspiration of the Qādīzādeli movement"; he then in due course prepared his way to the imperial capital Istanbul. It is in Istanbul where he engaged in a career as a mosque preacher, through "the path of sermon and admonition," conversely he eventually neglected the prudish teachings of his Balıkesir guides. It became apparent that Kadızadeler and Sufis were unable to get along because Birgili Mehmed himself had tried to seek a relationship with a Sufi order in his formative years. "As with Birgili, despite an initial affinity, Kadızade’s temperament and his religious predilections were determined to be unsuited to Sufism". He soon enduringly returned to his former career as a preacher by implementing a more strict approach to "sermon and admonition" together. Kadızade gradually became the most active antagonist of Sufism. He continued to be a religious instructor for many years at the Murat Pasha Mosque, Aksaray, Istanbul, where he was also appointed as a Friday preacher at the Yavuz Selim Mosque "in recognition of his gifts of expression and grace of delivery."