" Heath’s letter leaves the impression of someone with an apocalyptic worldview, someone who sees himself as part of a persecuted minority deserving justice and retribution, someone whose group identity is so strong he feels lost on his own, and someone with deep anxieties about his place within that group and a desperate need to prove his loyalty to its leader. It’s the mind-set of a fanatic, a man who harbors “such indignation against the enemy” that he can justify almost any crime as legitimate self-defense of his own people, who have been chosen by God for a sacred purpose. Not all Beaver Islanders held such beliefs, of course, but for an unknown number of hardened zealots, criminal activity had become a kind of sacrament. "

― Miles Harvey , The King of Confidence: A Tale of Utopian Dreamers, Frontier Schemers, True Believers, False Prophets, and the Murder of an American Monarch