White supremacist extremists will likely consult online manifestos for ideological and tactical guidance due to the success of past attacks and their idolization of like-minded extremists. The manifesto of Anders Breivik, a white supremacist who killed over 70 people in Norway in 2011, has been the inspiration for multiple white supremacist extremists, including Christopher Hasson, who created a target list of high-profile media members and political figures.
On April 27, John Earnest shot and killed one person and injured several others at the Chabad of Poway synagogue in California. Prior to the attack, Earnest posted a manifesto online stating he “hoped to inspire many more.” Additionally, in his manifesto, Earnest claimed Robert Bowers and Brenton Tarrant inspired him to conduct the attack and called for additional attacks. Furthermore, Earnest admitted he set fire to a mosque in Escondido, California, in March to support Tarrant.
On March 15, Tarrant targeted two mosques, killing 50 people and injuring 50 others, in Christchurch, New Zealand. Tarrant cited Breivik and Dylann Roof, a white supremacist who killed nine at a church in South Carolina in 2015, as two inspirational figures that led him to attack the mosques.
Following the Christchurch shooting, social media users urged others to share copies of Tarrant’s manifesto, insisting he “did nothing wrong” and that “Christchurch was just a pre-taste.” Additionally, online users discussed distributing the manifesto in multiple languages to mainstream online platforms along with propaganda with hopes to “radicalize [their] comrades” worldwide.