Holly's motive (includes spoilers)
Here's a plot element I'm still struggling with (from the synopsis):
"She reveals that she and her husband had been religious people .. until their son died of cancer at a young age. Holly and her husband decided to make a war on God by making children disappear without a trace".
Really? I find it unconvincing that being grief-stricken about the son's death she (and her now estranged/dead husband) decided to abduct/drug/brainwash/kill children on that basis. It's a major WTF plot hole. Any thoughts on this?