Azariqa in the context of "Islamic extremism"

The Kharijites (Arabic: الخوارج, romanized: al-Khawārij, singular Arabic: خارجي, romanized: khārijī) were an Islamic sect which emerged during the First Fitna (656–661). The first Kharijites were supporters of Ali who rebelled against his acceptance of arbitration talks to settle the conflict with his challenger, Mu'awiya, at the Battle of Siffin in 657. They asserted that "judgment belongs to God alone", which became their motto, and that rebels such as Mu'awiya had to be fought and overcome according to Qur'anic injunctions. Ali defeated the Kharijites at the Battle of Nahrawan in 658, but their insurrection continued. Ali was assassinated in 661 by a Kharijite dissident seeking revenge for the defeat at Nahrawan.

After Mu'awiya established the Umayyad Caliphate in 661, his governors kept the Kharijites in check. The power vacuum caused by the Second Fitna (680–692) allowed for the resumption of the Kharijites' anti-government rebellion, and the Kharijite factions of the Azariqa and Najdat came to control large areas in Persia and Arabia. Internal disputes and fragmentation weakened them considerably before their defeat by the Umayyads in 696–699. In the 740s, large-scale Kharijite rebellions broke out across the caliphate, but all were eventually suppressed. Although the Kharijite revolts continued into the Abbasid Caliphate (750–1258), the most militant Kharijite groups were gradually eliminated. They were replaced by the non-activist Ibadiyya, who survive to this day in Oman and some parts of North Africa. They, however, deny any links with the Kharijites of the Second Muslim Civil War and beyond, condemning them as extremists.

The Sufris (Arabic: الصفرية aṣ-Ṣufriyya) were Khariji Muslims in the seventh and eighth centuries. The Khawarij were divided into separate groups such as the Sufri, Azariqa, Bayhasiyya, Ajardi, Najdat, and Ibadi. The Sufri and Ibadi sects are considered the most moderate of the Kharijite groups due to their refusal to shed the blood of those who disagree with them. Of all the Kharijite sects, only the Ibadi sect continues to exist today.

In Tlemcen, Algeria, the Banu Ifran were Sufri Berbers who opposed rule by the Umayyad, Abbasid and Fatimid Caliphates, most notably under resistance movements led by Abu Qurra (8th century) and Abu Yazid. In Sijilmassa, Morocco the Midrarids adopted the doctrine.