How do Christians betray the fear motivating their decision to believe in superstitious nonsense?

They deny it, of course, like a madman denies his insanity, but fear is the only emotion powerful enough to override common sense. Fear is what motivates them to reject reality and instead believe in absurd myths and practice meaningless rituals; how do they betray this fear response? What of their arguments best exemplify the irrational fear that is in all of them?