I always marvel that while there are beaucoup conspiracies about JFK’s shooting, nobody even considers for a minute that there might have been a conspiracy behind Reagan’s shooting.
Well there’s no indication that Jody Foster had the slightest idea that Hinckley existed IIRC.
Crazy and obsessed is pretty much sufficient to explain Hinckley, there’s no need to invent a conspiracy.
For what it’s worth the JFK conspiracy industry got started by leftwing radical named Mark Lane, a lawyer with the National Lawyers Guild, a communist front group.
One goal was to deflect attention away from Oswald’s leftism and communism and throw suspicion on American institutions.