The VVitch: A New England Folktale (2015) is a surprisingly tricky film. The first moment you see it, you can't bring yourself to find a tiny piece of stereotypical spooky elements: there are no screamers, no demons and ghosts wandering around, but something about the family and forest they live in feels completely out of place. Soon you realize how deeply mistaken you have been all this time, then your mind grasps the real horror happening on the screen.
Among the other movies about the great evil hiding beneath the religious village or cult I can also mention:
La Monja (2005) – a Spanish film about a malicious nun terrorizing girls in Christian school in life and death;
The one favored by critics and terrified by the audience –
The Exorcism of Emily Rose (2005) covers the vague barrier between illness and possession;
A pure teen horror –
Where the Devil Hides (2014), about dark secrets of the Amish community and the demon born in it.