The FBI has to artificially manufacture fake terrorism incidents or else they can't conjure up any justification for their unnecessary amount of counter terrorism funding so it creates a perverse incentive structure for employees of that division where they try to manipulate people to commit deeds they otherwise never would've attempted and entrap them for it and when they fail to do so because they've encountered a man healthy enough to know to keep his cathartic fantasies confined to his internal life they throw the bureacrat version of a temper tantrum at not being able to destroy an innocent person's life as thoroughly as they'd prefer and come up with trumped up charges of gun possession and punish him for thought crimes as like a consolation prize.