Islamic radicalisation is widely appreciated as the very cognitive and ideological framework and denominator for the creation of a worldview that is hostile to the principles of pluralism and peaceful co-existence. Empirically tested knowledge of the phenomenon is, on the other hand, rather limited in regard to crucial questions such as: What motivates Islamic radicalisation of youth? How Islamic radicalisation shapes the values adopted by the individual radical Muslim? How Islamic radicalisation expresses itself through actual behaviour of those who are affiliated with it? On the basis of a Danish nationwide representative survey, and through a statistical hypothesis test, this study provides empirical knowledge on Islamic radicalization. The study examines Islamic radicalisation as a sociological phenomenon as well as a sociological process in a specific national context within a globalised world. Our long-term scientific aim is to contribute to the development of an empirically supported theory on Islamic radicalisation in the west.