Some time ago, P. Z. Myers made an important point. Atheists tend to find the beliefs of religions so incredible that we cannot believe that the people we know well personally, who seem to be perfectly rational in other areas of their lives, take those beliefs at face value. So we tend to delude ourselves that they consciously pay only lip service to the tenets of their religions and belong to religious institutions purely for the social benefits they get from belonging to the group. Hence we are surprised when we discover that we could not be more wrong. He says,

Many of us find it really hard to believe that Christians actually believe that nonsense about Jesus rising from the dead and insisting that faith is required to pass through the gates of a magical place in the sky after we’re dead; we struggle to find a rational reason why friends and family are clinging to these bizarre ideas, and we say to ourselves, “oh, all of her friends are at church” or “he uses church to make business contacts” or “it’s a comforting tradition from their childhood”, but no, it’s deeper than that: we have to take them at their word, and recognize that most people who go to church actually do so because they genuinely believe in all that stuff laid out in the Nicene Creed.

It makes the phenomenon of religion even scarier, doesn’t it?

Yes, it does, because it shows the power of religious indoctrination to persuade people to give up on rationality at least in some areas of their thinking. The Pew Forum on Religion and Public Life had a report titled How the Public Resolves Conflicts Between Faith and Science that had the following tidbit that sheds some light on this issue.

Indeed, according to a 2006 survey from the Pew Forum on Religion & Public Life and the Pew Research Center for the People & the Press, 42% of Americans reject the notion that life on earth evolved and believe instead that humans and other living things have always existed in their present form. Among white evangelical Protestants – many of whom regard the Bible as the inerrant word of God – 65% hold this view. Moreover, in the same poll, 21% of those surveyed say that although life has evolved, these changes were guided by a supreme being. Only a minority, about a quarter (26%) of respondents, say that they accept evolution through natural processes or natural selection alone.

Interestingly, many of those who reject natural selection recognize that scientists themselves fully accept Darwin’s theory. In the same 2006 Pew poll, nearly two-thirds of adults (62%) say that they believe that scientists agree on the validity of evolution. Moreover, Americans, including religious Americans, hold science and scientists in very high regard. A 2006 survey conducted by Virginia Commonwealth University found that most people (87%) think that scientific developments make society better. Among those who describe themselves as being very religious, the same number – 87% – share that opinion.

So what is at work here? How can Americans say that they respect science and even know what scientists believe and yet still disagree with the scientific community on some fundamental questions? The answer is that much of the general public simply chooses not to believe the scientific theories and discoveries that seem to contradict long-held religious or other important beliefs. [My italics-MS]

When asked what they would do if scientists were to disprove a particular religious belief, nearly two-thirds (64%) of people say they would continue to hold to what their religion teaches rather than accept the contrary scientific finding, according to the results of an October 2006 Time magazine poll.

If one needed convincing of the bad influence that religion has on people’s thinking and reasoning skills, that last paragraph should do it.