A Stimulus Word as a Barrier
If a word is so strongly charged with secondary meanings and emotional values, it tends to provoke a stereotypic response, e.g. prevent you from going further, from listening, reading, researching, thinking, evaluating and classifying yourself. It takes on the effect of a barrier.
This works excellently with the stimulus word "conspiracy theory".
Laugh, shut down. A learned reflex.
Just pay attention to it.
With Jehovah's Witnesses, it is the word "apostate" or "apostasy" that acts like an electric fence and makes one shy away from further information intake. You close yourself off from your own perception, your own reflection and evaluation and trust the conditioning you have received from someone else, and this happens unconsciously and in a split second.
Of course, after examining the facts, you can say: that seems improbable to me, I reject that, etc.. But that is something completely different from the stimulus word reflex, which stereotypically always triggers the same reactions.