This is why you never "tell" a faithful JW anything negative about their religion. They have programmed defenses that are all too predictable and powerful.
The only way to get through at all is to ask questions that get them to think and even then it doesn't always work. They have to be ready to do the most psychologically difficult thing it is for a person to do: accept the possibility that they've been wrong, duped, misled, for years or even decades.
Think of what learning the truth about the Borg did to you at first? Remember the anger? The anguish? The denial? Now imagine there is a part of the psyche that KNOWS that anguish is a possible result of accepting new and contrary information; how will new and contrary information be treated? It will be avoided at all costs because nobody wants to go through those horrible emotions. It isn't done consciously but that doesn't make it any less real.
And that is just a part of it that doesn't even take into account the mind control that's put on them by the Borganization.