An attack at a California Islamic center is the latest violence where the perpetrators said they were inspired by past atrocities, such as the 2019 massacre in Christchurch, New Zealand. The teens attacked the Islamic Center of San Diego this week and killed three men and themselves. Researchers who study extremism have long noted the resonance of the Christchurch attack among far-right assailants. They attribute it to the extent of the violence, the document the killer posted about his actions, and his decision to livestream the massacre.