I rented this movie with a friend a couple of days ago, and very much enjoyed it. However, reading it up online, I’m surprised by one thing about most critics’ reactions; they seem to believe that the movie definitely, by the end, showed us that there were in fact demons and that Adam and Dad were demon-killers.
I think that’s definitely one possible way of looking at it, but I don’t think it was that cut-and-dried. We only ever see the visions from Adam’s point of view, which makes them highly subjective. The sheriff he kills seems to be saying ‘How did you…’ as Adam touches him, but he might not be referring to his supposed murder of his mother at all (“How did you break free?” “How did you know where the handcuff keys were?” How come you’re such a psycho?").
The other evidence is strong, but I think still leaves the film ambiguous. Fenton almost certainly a serial killer, but that doesn’t mean he was a demon -we saw his extremely troubled upbringing and growing nihilism, which could easily have pushed him over the edge. The video camera going fuzzy is eerie, but could just be random chance, or even evidence of some kind of conspiracy of crazy “demon-hunters” in the police force.
There’s also theological considerations. Would a loving God inflict such pain and responsibility on an ordinary family? Of course, it’s strongly implied that we’re talking more about a fire-and-brimstone, Old Testament type God anyway, so maybe that point’s not as strong.
Now, I’m not saying that the film is completely and indisputably just about a family (and maybe conspiracy) of crazy serial killers; there’s far too much evidence for demons actually existing within the film. But I am saying that I think the ending is deliberately ambiguous, and we can’t be totally sure one way or the other.
Any thoughts?