The number of US mass killings linked to extremism over the past decade was at least three times higher than the total from any other 10-year period since the 1970s, according to the Anti-Defamation League. The ADL report also found that all extremist killings identified in 2022 were linked to rightwing extremism, with an especially high number linked to white supremacy. They include a racist mass shooting at a supermarket in Buffalo, New York, that killed 10 Black people and a mass shooting that killed five people at an LGBTQ+ nightclub in Colorado Springs. “It is not an exaggeration to...