Exactly! It is virtually impossible to get through the effects of Mass Stockholm Syndrome; because any evidence against the brainwashers is perceived by the victim as an attack upon the victim, who cannot for the life of them conceive how the brainwashers are culpable, nor believe evidence of their crimes. Would not recommend waterboarding; but it seems, in this case, to have been effective. Relapsing by the brainwashed can be quick, and unpredictable. This bit is from personal experience of trying to break through to someone near & dear.