Breivik manifesto continues to influence extremist violence 15 years post-attack

Fifteen years after the 2011 Norway attacks, security experts identify Anders Breivik's manifesto as a persistent ideological catalyst for global far-right terrorism. The report highlights a recent May 2026 mosque shooting in San Diego, where perpetrators explicitly cited Breivik as an inspiration, underscoring the enduring nature of digital extremist radicalization.