in the San Francisco corners of counter-culture, CIA mind control with LSD was a common and well-known story past the late 1960s. Also J Edgar Hoover, terror of Red America, was a cross dresser; various stories about the JFK Assassination involving the US Secret Services; support of dictators in South America and the Middle East.. lots of things like that. Stories and attitude like that was one of the many reasons Mr Clean-cut Los Angeles Defense Ronald Reagan especially despised that crowd.
The thing that always gets me about the JFK assassination, is after JFK fired Dulles, he was then put in an important position in the Warren Commission and would work out of his home on the investigation, despite no longer working for the agencies.
People shout about "Deep state" stuff all the time but these guys really did have an inordinate amount of power that was not on a leash whatsoever. They do things the President is ignorant about. If the President can be considered not on a need-to-know basis, whatever is happening by that agency is effectively a "deep state" operation, regardless of if you believe there's a vast deep state conspiracy.
forgot to mention the most obvious one from that time.. millions of regular people against the Viet Nam war, and that war did not stop. Those ten years turned many ordinary US citizens into cynics, and gave fuel to the more extreme stories that were passed around.