Relativity is key to right understanding. Things are not true and false: things are–to some degree–true and false.
Every verbal formula is limited, being some distance from the light.
Recognition of paradox is key to right understanding. Everything expressed in words challenges the mind to understand a paradox.
Understanding does not make its home on the astral plane where relativity and paradox are virtually unknown.
We could say that people who do not comprehend relativity and paradox are fanatics. But that formula does not correspond well with the above affirmations.
Therefore, it is better to say that, to the degree that people do not understand relativity and paradox–to that degree–they tend to be fanatics, or at least relatively mistaken.