Wrong.
The social conditioning work mostly came out of Tavistock Instiitute in the UK.
MK Ultra did not use psychedelics that much. There were other drugs used for specific effects, but the core work still required physical torture, mental torture and at least one cycle of friendship and betrayal. Then once the mind was shattered, and the patient was dependent on the therapist, began the programming work with long sessions of role playing, visualization, always with neural monitoring so that the programming bypassed the person's will.
It is entirely possible, that some of these MK Ultra slaves ended up being possessed by demons once the mind was in the weakened and shattered state. During programming, fragments of the mind are gathered into personalities, often named personalities, and triggers are set to call forth, or sen away, each personality. At this stage it is also possible that a demon took control of one of these personalities. But I don't think that demonic possession was a standard part pof MK Ultra.
Some of the bloodlines whose practices were incorporated into MK-Ultra, likely did do this demonic possession for their key members.
There are many different people who have written accounts of MK Ultra and related techniques. There are variations and overlaps and the formalized techniques have continued to evolve.
Back to Tavistock. Remember I mentioned that some drugs are used. What if those are illegal drugs that ordinary people take, before they sit and watch TV at home? Can you see how a TV program could program people bypassing their will, if the illegal drugs put the brain in the correct state? It's hit or miss, but statistically, you would be able to program a certain percentage of all drug users.
So if you watch some of John Oliver's comedy shows while you are stone cold sober, you can see how he uses timing, and sequences of joke, ridicule, punchline to place ideas in susceptible minds. You may find his work revolting, but take the right drugs, and you'll end up becoming a liberal fanatic.
What do you think happens when the supply of illegal drugs dries up?