After the dual terrorist attacks in Norway on 22 July 2011 , his insights and his book have been used in mainstream media to explain the violent potential in some of the ideologies and conspiracy theories utilized by the far-right , anti-Islamic groups in Europe . His 2011 book '' Det mørke nettet '' ( the dark network ) was praised by a reviewer for NRK as " an important contribution to understanding radical right movements , ideologies and actors in Norway and in Europe "
terrorist attacks in Norway
2011 Norway attacks
Øyvind Strømmen