Hatriot Killers' 'Dark Inspiration'
What sparked Jerad and Amanda Miller's Las Vegas killing spree? Daily Beast editor-in-chief John Avlon points to right-wing extremist 'echo chambers' where violent anti-establishment rhetoric masquerades as patriotism. 'Words matter; ideas matter,' says Avlon. 'It's not causality, but there's a connection and it needs to be analyzed.'