Pollsters … have reported repeatedly that they can find little measurable difference between the moral behavior of churchgoers and the rest of American society. Barna has found that born-again Christians are more likely to divorce (an act strongly condemned by Jesus) than atheists and agnostics, and are more likely to be racist than other Americans. And while evangelical adolescents overwhelmingly say they believe in abstaining from premarital sex, they are more likely to be sexually active — and at an earlier age — than peers who are mainline Protestants, Mormons or Jews … .
How to explain the Grand Canyon-sized gap between principles outlined in the Gospels and the behavior of believers? Christians … respond that shortcomings of the followers of Jesus are simply evidence of man’s inherent sinfulness. But if one adheres to the principle of Occam’s razor — that the simplest explanation is the most likely — there is another, more unsettling conclusion: that many people who call themselves Christian don’t really believe, deep down, in the tenets of their faith.