If you look at the "Devil" movies like "Rosemary's Baby", "Exorcist", "Devil's Advocate", "Damien", or any of the Grade-B ones on the 70's one thing strikes you about them. God is completely and totally out to lunch. He is no help at all. The humans are completely on their own. In fact, religion is reduced to sorcery with crosses and holy water as magical talismans and prayer as spells.
But let's add to this list of Catholic inspired movies. What about the Irwin Allen disaster movies ? Where the prophet prophesies doom and calls upon the people to follow him to salvation and they angrily refuse and immediately thereafter are striken dead for their sin ? Like the people in the ballroom of the Poseidon who angrily refused to follow Gene Hackman because "help is on the way". And drowned like rats in a rain barrel minutes afterward.
I've noticed that too. In fact, even the trappings of religion don't work anymore. How many vampire movies have you seen in which the villain is shown a cross and simply slaps it away? Or when he actually enters a church and commits his foul deeds before the altar?
Not only do such portrayals reduce religion to a pathetic, ineffective institution, they belie the entire myth. Vampires are soulless; that's why they have no reflections in a mirror. The Cross is a reminder to them of their utter damnation: to wander the earth eternally, forced to find their sustenance in the lifeblood of others, yet to no ultimate end. Since they are not really alive (they are the Undead), they can never really die. Yet since they are soulless, they can never really live.
They are an abomination before God, and He will not suffer their presence. Nor can they tolerate His, in any form. The notion that one could ever enter sacred ground is absurd.