@Setanta,
Setanta wrote:In the last few years, they would ask people who claim a religious affiliation if they believe in god. That must have struck the true believers as awfully odd--but the big surprise is that about 10% of self-professed Catholics and Protestants say that they don't believe there is a god.
That's a good start. Next, let's have the pollsters ask Christians if they believe in the virgin birth and the resurrection. Let's ask Catholics if they believe that wine literally turns into the blood of Jesus during the eucharist. And while the pollsters are at it, let's have the pollsters throw in a few trivia questions to test if they've read the book. Like this one for example: "The first book of the New Testament is _____". Options: "Matthew", "Genesis", "Acts of the Apostles", and "Psalms". When Ipsos-Nori asked this in Britain, 35% of self-professed Christians got it right. (Flipping a coin would have yielded 25%, though Ipsos tactfully doesn't say that.) It certainly seems as if self-identifying as Christian often happens for sentimental reasons or out of sheer ignorance.)
For those who are interested, Ipsos-Nori has a summary of their British survey
here (PDF). I wish they did such a detailed study in the US some day.