I think Nick Berg's father is behind all this crap.
He is part of the list of dark characters surrounding and involved in this story.
That would certainly explain his inexplicable lashing out at Bush for "killing his son." If senior Berg is involved in all this, his guilt and self-rage must be unbearable. SO unbearable, in fact, that he would have to project it or displace it onto someone else just to survive this horror.