San Diego shooting shows disturbing trend of shooters copying acts of violence

Experts say hate-motivated extremists being radicalized online and adopting ideologies of shooters before themThe killing of three men at a San Diego mosque on Monday is the latest example of a disturbing trend in recent decades: hate-motivated shooters learning from – and copying – each other in acts of violence meant to push the nation toward a race war and, ultimately, societal collapse.The two San Diego shooters, who were 17 and 18, killed 51-year-old Amin Abdullah, a security guard at the I...