From The Guardian:
If religion isn't the greatest threat to rationality and scientific progress, what is? Perhaps alcohol, or television, or addictive video games. But although each of these scourges - mixed blessings, in fact - has the power to overwhelm our best judgment and cloud our critical faculties, religion has a feature of that none of them can boast: it doesn't just disable, it honours the disability. People are revered for their capacity to live in a dream world, to shield their minds from factual knowledge and make the major decisions of their lives by consulting voices in their heads that they call forth by rituals designed to intoxicate them.
It used to be the case that we tended to excuse drunk drivers when they crashed because they weren't entirely in control of their faculties at the time, but now we have wisely inverted that judgment, holding drunk drivers doubly culpable for putting themselves in that irresponsible position in the first place. It is high time we inverted the public attitude about religion as well, finding all socially destructive acts of religious passion shameful, not honourable, and holding those who abet them - the preachers and other apologists for religious zeal - as culpable as the bartenders and negligent hosts who usher dangerous drivers on to the highways. Our motto should be: Friends don't let friends steer their lives by religion.