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Author: Leoni Heyn Joe Whittaker a Department of Political Science, Institute for Social Sciences, Kiel University, Kiel, Germanyb Department for Research on Terrorism and Radicalization, Institute for Security Policy at Kiel University, Kiel, Germanyc Department of Criminology, Sociology and Social Policy, Faculty of Humanities and Social Sciences, Swansea University, Swansea, UK