I think Chuck Missler is attributed with this quote, and while I don't agree w/ everything he says on the subject, this quote rings absolutely true to me:
"The opposite of a saint is not a sinner.
The opposite of a saint is the Nephilim."
The idea is that Christianity often sets up believers as the "good guys" and non-believers as the "bad guys," but in fact, the bad guys are these wicked things bent on destroying God's good order. Humanity is full of saints and sinners, and humanity is full people God is intent on rescuing.