I really recommend The Wailing (2016), a unique Korean horror that stayed in my thoughts for quite some time.
Alongside that, also check out The Innocents (1961) for some vintage horror, and I see Babadook (2014) hasn't been mentioned yet, that one is also a favourite of mine.
Yeah if anything they have proven to be incredibly adaptable . Absorbing local pagan rituals to stay popular/relevant: https://en.wikipedia.org/wiki/Christianity_and_paganism#Pagan_influences_on_Christianity. I'm sure they would find a mental-gymnastics way to rationalise intelligent life on another planet and how it's all part of God's plan.