Not sure but I'd suspect that they see more clearly than most just how far down the path to hell this country has already been taken by the left and they are becoming increasingly scared about how their way of life will be affected by a Kerry White House. That, and the fact that the president is the most outspokenly Christian leader this country has had in decades.
I got alot of help with this question. For example, see post 72. You seem to have put your finger on it.