The history of the CIA's acquisition and use of psychedelics and other drugs is detailed in 'Acid Dreams: The CIA, LSD and the Sixties Rebellion' (1994) Certai

The history of the CIA's acquisition and use of psychedelics and other drugs is detailed in 'Acid Dreams: The CIA, LSD and the Sixties Rebellion' (1994) Certainly the CIA was trying to use psychedelics as interrogation tools and perhaps as part of a 'dirty tricks campaign' (secretly dosing politicians before speeches, etc.), and there was a lot of collaboration with various university psych departments in terms of research (students, prison inmates, etc. as research subjects) as well as in prostitution houses. This is all well-documented. However, it really escaped from their control and had unexpected side effects. A good case example is that of Frank Olson, a bacteriological warfare specialist who was collaborating with the CIA in the MK-ULTRA program. After being dosed in a 'training session' with CIA members, he had apparent pangs of conscience (early 1950s) and wanted to quit the program. This was a period when the USA had an active biological weapons program, built in part on research results taken from the Japanese biological weapons program, and may have been testing biological weapons in North Korea as well. (This was all later exposed in the 1970s Congressional hearings, but at the time was top secret). It's quite likely that the CIA assassinated Frank Olson while claiming his death was a suicide, out of fear he would reveal all this to the public. Hence, I doubt the central theme of your argument - psychedelics can have a wide variety of effects on individuals, and tend to be feared by authoritarians because of these unpredictable effects (abandoning religious belief or faith in authority is not an uncommon result). In addition, drug use is something humans have gravitated towards in every known society throughout recorded history, there's no need to invoke secretive government agencies and hidden motives to explain it.