Quoting Russell Coker (russell@coker.com.au):
Yes, it's not like stamp collectors. If all the stamp collectors in the US had a particular political belief then it wouldn't affect public policy unless they had a very targeted agenda and the money and organisation skills of the NRA.
While some of the theories about memes are a bit extreme, the general concepts hold water. If 25% of the population consistently makes some claim then people who hear that will tend to think that it has some merit. 25% is enough that almost everyone in the US will have a friend of a friend who's an evangelical and most people will have a friend or relative who is.
You had absolutely no basis for claiming that a majority of Americans would or would not read the Bible, irrespective of what his alleged 25% of the population is. This is obvious. You put yourself in a hole by claiming otherwise. Stop digging.