(Schiffauer 1987, 1991, 1997, 2004, 2008). In his studies dealing with the Islamic Communities of the Caliphate state (2000) and the Islamic Community Milli Görüş (2010) he analyzes the organizational dynamics of transnational religious communities which result from operating in nationally separated organizational environments. His analysis on identity shifts among second generation Muslims in Europe centers on structural changes in the transnational outlook 2007). In the context of his critical analysis of the security policies with regard to Islamic communities he concentrated on the strategy of de-limiting, isolating and combating of supposedly problematic communities. He focused on the processes of knowledge generation underlying and legitimizing these policies, as well as on the non-intended consequences of these policies with regard to radicalization and deradicalization.