you would have to be profoundly unintelligent ... to honestly believe that an experiment is being allowed that lets you torture people much less practically to death
um ... did you live through 2020 ~ now? I don't think you have to be unintelligent at all. We watched billions of intelligent people go absolutely fucking shit crazy over re-branded flu and inject the least tested drug in modern drug regulatory history right into their arms.
I don't think IQ plays into it at all. I've watched the Milgram videos I think most of them thought it was real. They might not have believed the person in the other room was passed out or dead (subconscious lies, rationalization, justification, "this is Harvard, surely not", etc.) but it doesn't matter. They still took the action.
If anything the first half of the 2020s shows how easy it is to manipulate people in even worse ways using media and authority.