The study was published on Wednesday by the federal police agency tasked with protecting the US president and other senior members of the US government. They looked at 173 incidents from 2016 until 2020 in which three or more people were hurt in attacks in public spaces, including workplaces, schools, houses of worship, military bases, nonprofit service providers, residential complexes, public transportation, and open spaces.
Among their findings were that one-quarter of perpetrators “subscribed to a belief system involving conspiracies or hateful ideologies, including antigovernment, antisemitic, and misogynistic views.”
“The internet allows individuals to come together and share common interests across online platforms and communities; however, these online communities can provide a place for violent and concerning ideas to manifest,” the report notes. “Nearly one-quarter of attackers were found to have conveyed concerning communications online, such as threats to harm others and posts referencing suicidal ideations, previous mass shootings, violent content, and hate toward a particular ethnic group.”