1 God, 3 Persons... get it?
Dissociative identity disorder, once called multiple personality disorder, results in two or more split identities.
Thats exactly what happens when religion teaches people to believe that nonsense is the truth, the ability to profess a belief in the ridiculous is faith, and any rational thought or objection to that bullshit that might arise in their own mind is a satanic assault from an invisible disembodied entity which inspires the person to reject the very part of their own conscious mind which could possibly save them from the inevitable dissociative madness and a life of blindness, suffering and victimization by the real devils who fucked up their minds..
....And once a person loses their mind, with what can they get it back?
And who could possibly help them especially when they perceive that rational thought and disbelief is a sign of Satan in others?
There is no greater darkness than the darkness in the mind of the person whose only light in life is a lie.