Intelligence - the abstracting, systematizing ability and preference - is a barrier to understanding Christianity (to understanding The Truth).
Intelligence is also a disposition to heresy and apostasy.
As an elite of intellectuals have become leaders of The West - so they have imposed abstract modes of thinking on society, and made simple apprehension of Christian Truth less and less possible.
(And made it low in status; such that those who achieve real understanding are seen as simplistic, ignorant and child-ish rather than admirably child-like.)
I believe that abstracting, systematizing intelligence is useful in many situations, especially in gaining power over other people and over nature (which may be used as a force for Good, or Evil); but intelligence is a barrier to understanding Christian Truth.
Intelligence plus pride in that intelligence often proves to be an insuperable barrier to understanding Christian truth - perhaps it is the hardest barrier of all to overcome.
Modern Western society (ruled by intellectual elites) is precisely characterized by these attributes: intelligence (ie. abstract systematic understanding) plus invincible pride in this intelligence.
Since these elites fill the minds of most of the populace most of the time via public administration, educational institutions, and the mass media; and since the social institutions (law, health services, the military etc) are structured internally and in their communications by abstract systems - then it is unsurprising that The West is the least religious society ever to exist.
Used as a ruling principle, intelligence is a psychological illness and a social pathology: evidence for which is the loss of basic biological imperatives such as reproduction and self-defence.
Intelligence ought to be a tool, not a ruling principle.