Not everyone who describes themselves as Christian or Jewish believes in God. Indeed, only 76 percent of Protestants, 64 percent of Catholics, and 30 percent of Jews say they are "absolutely certain" there is a God.

...according to this Harris Poll of U.S. adults.

I wonder how many Christians would tell you they believe in reincarnation, to the sighs of clergy that the uneducated believers got the faith wrong.