I suppose when Hitler manipulated the masses to participate in the horrific actions of the Nazis, the individual was also acting rationally in his own mind. And yet my point is that since Sigmund Freud we know what the result will be when governments or media decide to manipulate the masses. So from that perspective it is measurable, even if on an individual level the action was rational.
Discussion
If you're into Freud, have you ever read Philip Reiff's two books:
[Freud: The Mind of the Moralist](https://amzn.to/3sHdsQm)
[Triumph of the Therapeutic: Uses of Faith after Freud](https://amzn.to/3EsmF1G)
Both are extremely insightful, in my opinion.
Thanks for the recommendation. Will check them out