The Hanbali school, the most restrictive of the four Sunni legal schools on this question, and its modern Wahhabi and Salafi descendants reject the classical two part division and treat bidah as a category to be avoided altogether rather than sorted into good and bad. Their argument runs that the Prophet himself declared every innovation misguidance, a saying reported in the hadith collections, and that a Muslim's duty is to follow the practice he and his earliest companions actually kept rather than to improve on it by later addition, however well intended. Applied case by case, this reasoning targets specific, named practices rather than innovation in the abstract: visiting the graves of saints and praying at them, celebrating the Prophet's birthday, known as the mawlid, and much of the devotional calendar that grew up around Sufi shrines across the Muslim world over the centuries since. Movements shaped by this reasoning, from eighteenth century Wahhabism in Arabia to twentieth and twenty first century Salafi currents worldwide, have at times acted on the conclusion directly, demolishing shrine structures judged to encourage improper devotion. Other Sunni Muslims, including scholars within the same broad legal tradition, continue to treat these same practices as legitimate developments rather than innovations requiring correction, which is exactly the disagreement the classical two part framework had made room for and the stricter reading closes.