Anders Behring Breivik was convicted for the 2011 Norway attacks , in which he killed eight people by detonating a van bomb amid Regjeringskvartalet in Oslo and then shot dead 69 participants at a Workers ' Youth League ( AUF ) summer camp on the island of Utøya , leaving 77 dead . On the day of the attacks , Breivik electronically distributed a compendium of texts entitled '' 2083 : A European Declaration of Independence '' , describing his militant ideology . In them , he lays out a worldview that encompasses opposition to Islam and blames feminism for causing Europe 's " cultural suicide " . The texts call Islam and " Cultural Marxism " the enemy and advocate the deportation of all Muslims from Europe based on the model of the Beneš decrees , while also claiming that feminism and Islam exist to destroy Christian European culture . Breivik wrote that his main motive for the atrocities was to market his manifesto . Breivik contends that he is waging a Christian Crusade against multiculturalism and believes that the attacks were " necessary " . His manifesto also states that its author is " 100 percent Christian " , but he is not " excessively religious " . Nevertheless , he said he planned to pray to God for help during his attacks . Before the attacks , he stated an intention to attend Frogner Church in a final " Martyr 's mass " . In 2015 , Breivik claimed to be an Odinist , but Breivik and others have previously linked his religious beliefs to Christianity during the attacks
2011 Norway attacks
2011 Norway attacks
Christian terrorism