More Christian than American?

I was catching up with my reading of the Cliopatria blog and found a discussion of Pew's research on the feelings of European Muslims, including this quote:

"French Muslims may feel more French than British Muslims feel British, but the question of how minorities feel about their citizenship and nationality has, in the past, produced highly deceptive results. Those who claim to be true French may have more to say about how integrated French Muslims really are."

I started to wonder. Suppose Pew asked Americans if they considered themselves more Christian or more American, more Jewish or more American, etc.? From my reading, and understanding of my preacher forebears, anyone devoutly religious would have to say: "I'm more Christian than American"; or whatever religion. Certainly anyone who believes in the hereafter would have to. Wouldn't they?