I've been discussing the relative merits of a scientific world view versus faith, with Lesley over on her blog. To clarify my view, basically how I get to my world view, I've added a couple of posts on this blog:
Contingency of Knowledge - How I get started, about what I can know.
Human Fallibility - Why we have to be careful about what we conclude.
Lesley has responded today with this post on Human Fallibility.
The distinction I would make, between our two positions, is as follows.
What Lesley is describing are the effects of actually believing, some of which are good, but others bad. The problem is that choosing to believe on faith leaves people open to persuasion or even indoctrination, and the way that goes, good or bad, seems to be the luck of the draw. If it goes the wrong way then faith can be used to justify awful behaviours.
The other side of the distinction between religion and a scientific approach is that the critical thinking that is promoted on the science side encourages self-analysis to an extent that faith doesn't - some Christians being exceptions rather than the rule.
As a result of this, another bad effect of faith is that it provides justification for avoiding the effort to think too much. This can be carried over to other areas of human interaction, where it's easy to let a view on marriage, sex, law, education, or politics, be so guided by one's religion that it's natural to just decide on the basis of what your own religion or you local or personal spiritual leader says. But this is often disguised by the fact that some critical thinking does go on, but only within the framework of the faith - the faith trumps reason.
Further, though each religion may recognise the existence of other religions it tends not to scrutinise them too publicly, too critically, particularly in a multi-cultural society like ours, because, I think, that there is genuine apprehension about exposing it's own inconsistencies. This leads to an odd form of cultural relativism within religions that is somewhat like the left wing secular cultural relativism - where for the latter, you say anything goes, and for the former, you keep quiet about uncomfortable differences because of the uncomfortable similarities. We end up with daft compromises, like Rowan Williams on Sharia, in order to maintains one's own privilege.
Here is a guide that demonstrates potential problems with thinking processes, with particular reference to belief in God. It's a little bit geeky, but if you can get through it, it should shed light on what I think is wrong with religious thinking.
And, here's another quick guide.
Like all theories based on psychological research there are often controversies and new research results, but generally these modes of influence on thinking are well recognised, and identifiable in much religious discourse. Some of the above are also associated with logical fallacies in reasoning.
Of course this requirement for critical thinking applies to our side of the debate too. We too are human and not immune to error, and have to listen to criticism fairly.