The hook here is pretty cool, the idea of divine intervention actively working overtime in favor of one person introduces a very interesting examination of religion, particularly that of the Will of God.
What does it mean for God to choose this person over all these other people? Does this mean that the value of this one life somehow weighs higher than everyone else's? What do they feel about it? There's just a lot of interesting ways you can explore this base concept.
Unfortunately, the ending just falls flat. The big reveal of the corpses doesn't really matter, we already know blood is being spilled implicitly, and their little crisis just doesn't do the concept justice. On the basis of horror, it's overtly physical when the primary anomaly is so obviously spiritual.
