Folie à deux, from the French for "a madness shared by two" (or shared psychosis) is a psychiatric syndrome in which symptoms of a delusional belief are transmitted from one individual to another.

The guy talking is psychotic, and the camera man believes him: a madness shared by two.

"...men are not so far from the truth as they generally believe. Their greatest error is in searching for it where it is not, and in attaching it to forms; whereas, they ought, on the contrary, to avoid form in order to dwell upon the essence." Fabre D'Olivet

Rather than STOP and say, 'Woops! I'm headed in the wrong direction,’ we tend to place a premium on projecting a consistent image of ourselves and try to rationalize our initial decision despite increasing evidence suggesting we ought to do the contrary. B M Staw

… many people today don't want honest answers insofar as 'honest’ means 'unpleasant’ or 'disturbing.’ They want a soft answer that turneth away anxiety. — Louis Kronenberger

Man prefers to believe what he prefers to be true. — Francis Bacon

"How to teach again, however, what has been taught correctly and incorrectly learned a thousand thousand times, throughout the millenniums of mankind's prudent folly." ... "The easy thing is to commit the whole community to the devil and retire again into the heavenly rock dwelling, close the door, and make it fast." — Joseph Campbell