Islamist extremism is characterised by instrumentalising faith for the enforcement and legitimation of a claim to power. In doing so, a minority who considers their interpretation of faith as a counter model to Western, democratic forms of state and society relies on the necessary restoration of a supposedly lost order. In order to justify the violence and terror needed to enforce this order, Islamist extremists argue that the written interpretation of their beliefs and the alleged demands contained therein are justified. According to their interpretation, the use of terrorism is not only legitimate against infidels, but also against members of their own religious community who do not share their extremist view of the world.