PARIS, FRANCE: Not all extremists are psychopaths, and not all psychopaths turn violent.
However when a person craving violence is drawn in by Islamic State (IS) ideology offering them glory and a sense of belonging, it provides a volatile mix that can lead to the kind of massacre seen in the south of France last week, experts say.
UNITED STATES/CANADA: Omar Mateen, who killed scores of people in an Orlando gay club, had been taunted for being a Muslim when he worked as a security guard at a court.