2013 video clip where Shiite Islamist fighters executed alleged captured Syrian rebels with the claim by one of the shooters that: "We are performing our taklif [religious order] and we are not seeking personal vengeance." Boko Haram in Nigeria According to researchers Jacob Zenna and Zacharias Pier, takfir has been a major part of the focus of Boko Haram under the leadership of Abubakar Shekau. after 2010 ... Shekau, believed that jihad was obligatory and that not actively joining his jihad was tantamount to apostasy. This did not mean Shekau actively killed anyone after he announced jihad and renamed the group "JAS" in 2010. Rather, there was a "priority scale" with Christians, the government, and publicly anti-JAS Muslim preachers targeted first. This also meant any Muslims killed collaterally were not a concern since they were "guilty" for not having joined his jihad. ... [by] October 2010, ... assassinations targeting Muslim religious leaders, especially Salafists who opposed JAS's religious interpretation, as well as civil servants, became an almost weekly occurrence in northeastern Nigeria. In addition to this, prisons, banks, churches and beer halls also were common targets of attack The policy led to a schism in the group, and after Shekau ordered an "urban invasion" in Kano in 2012 where "up to 200 people" were killed, a splinter group called "Ansaru" left, complaining of the excessive killing of Muslims. See also Deobandi Islamofascism Wahhabism References Explanatory notes Citations Further reading Sahih al-Bukhari 4.574 AbdulHaq al-Ashanti and Abu Ameenah AbdurRahman as-Salafi, A Critical Study of the Multiple Identities and Disguises of 'al-Muhajiroun': Exposing the Antics of the Cult Followers of Omar Bakri Muhammad Fustuq, Jamiah Media, 2009 AbdulHaq al-Ashanti and Abu Ameenah AbdurRahman as-Salafi, Abdullah El-Faisal Al-Jamayki: A Critical Study of His Statements, Errors and Extremism in Takfeer, Jamiah Media, 2011 Reza Aslan (2009), Global Jihadism as a Transnational Movement: A Theoretical Framework, PhD dissertation, University of California Santa Barbara. Jason Burke, Al Qaeda: The True Story of Radical Islam, Penguin, 2004 External links Islam-related controversies Islam-related slurs Islamic extremism Sectarianism