Didn’t it also inspire the assassin of John Lennon?
In the sense that Taxi Driver inspired the guy who shot at Reagan. Crazy will Crazy.
And the killer of Rebecca Schaeffer.
There’s definitely some funny business going on in that book. Books that were heavily pushed post-1947 are suspect. Much of what JD was doing for the government immediately after the war is still classified, but we do know he was high up in Intelligence.