Sometimes people do show us the right path, dont they? Well being a horror fanatic I have read Amityville horror as a thirteen or fourteen year old I believe, in bengali. Then read four books in my twenties, watched one movie too.
How many versions have been told about that horrible incident, which most probably just the outburst of a mentally disturbed boy or a pair of really disturbed siblings!
How we love to guess every possible explanation, starting from logical to absolute insane, forgetting totally we are talking about a family, including some small children, who were slaughtered by someone they totally trusted!
We do sometimes cross the limits of humanity when we are speculating!