Obviously the show is grade A copaganda. Fincher has always really loved the idea of a bunch of unhinged psychos lurking behind every corner to get you. Really plays into the thesis of Programmed to Kill, which is that the feds/CIA created the idea of the serial killer to cause fear and chaos in the public so that we would welcome the police state we currently live in.
Sounds like he should have been able to write a better book with less filler if he spent 20 years on it. Its his fault if people get mentally exhausted cause every claim somewhat backed with evidence is surrounded by describing what 3 people "reportedly" were doing or involved in, 5 occult dates that the event happened close to and a short description of what Anton LaVey was up to at the time. If its bad writing its bad writing no matter if its for style or tongue in cheek, though I lean on the side of "was not confident in his actual facts and evidence" than doing it for a laugh.
Are you talking about the Manson CIA connections? That's in a different book called Chaos by Tom Oneil, which he spent 20 years writing.
Anyway, this stuff is fun. Go listen to the Death is Just Around the Corner podcast if you haven't.
Sure it may be fun but Qanon can also be fun to read and I wouldnt want people to sincerely believe in that, especially if it essentially ends up slandering people without concrete evidence. I didnt have time to check out the Oneil book but frankly having to slog through Terry and Mcgowen I have no desire to.