Seems that 24% of Protestants and 36% of Catholics are confused as to what a Christian is.
Not everyone who described themselves as Christian or Jewish said that they believed in God. Only 76 percent of Protestants, 64 percent of Catholics, and 30 percent of Jews said they are “absolutely certain” there is a God.
Not So Fast 
Curious indeed. Although I am not very surprised. It seems that in post modern times you can call yourself anything you want and of course no one else can question you.