So let me get this straight
A bunch of Teutonic d-bags massacre an entire village because the villagers are supposedly demons, which they do prove to be. Then a church gets built to contain an infection by a medieval scientist who is later murdered by his own employers for witchcraft and then gives a final speech about how they are wrong and the whole thing is supposedly a disease? But it's still demonic anyways?
La Chiesa had a lot of cool imagery and surrealism but it reads as though the script went through only one draft. I got the feeling that the film's subtext was critical of religion but then again it seems to endorse religion. Weird