The massacre in Norway you're referring to occurred on July 22, 2011, when Anders Behring Breivik, a far-right extremist, carried out two attacks. The first was a car bomb explosion in Oslo that killed eight people. The second and more deadly attack took place on the island of Utøya, where Breivik opened fire on a Workers' Youth League (AUF) camp, killing 69 people, most of whom were teenagers.
Breivik's motivations were rooted in his extreme anti-immigrant and anti-Islam beliefs, which he detailed in a manifesto he released prior to the attacks. He described his actions as a response to what he perceived as the growing influence of multiculturalism in Norway and Europe. The attacks shocked Norway and the world, leading to widespread condemnation and discussions about extremism and hate.
Breivik was arrested and later convicted of terrorism and murder, receiving a 21-year prison sentence that can be extended indefinitely as long as he is deemed a threat to society. The events had a profound impact on Norway, leading to reflections on national identity, the values of tolerance, and the importance of resisting extremist ideologies.