One of the main tenets of Abd al-Wahhab’s doctrine has become the key idea of takfir.Under the takfiri doctrine, Abd al-Wahhab and his followers could deem fellow Muslims infidels should they engage in activities that in any way could be said to encroach on the sovereignty of the absolute Authority (that is, the King). Abd al-Wahhab denounced all Muslims who honored the dead, saints, or angels. He held that such sentiments detracted from the complete subservience one must feel towards God, and only God. Wahhabi Islam thus bans any prayer to saints and dead loved ones, pilgrimages to tombs and special mosques, religious festivals celebrating saints, the honoring of the Muslim Prophet Muhammad’s birthday, and even prohibits the use of gravestones when burying the dead.
“Those who would not conform to this view should be killed, their wives and daughters violated, and their possessions confiscated, he wrote. “