Is Religion A Threat To Rationality And Science?

Professor Daniel Dennett argues it is:

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.

While Lord Winston argues it isn't:

The problem is that scientists now too frequently believe we have the answers to these questions, and hence the mysteries of life. But, oddly, the more we use science to explore nature, the more we find things we do not understand and cannot explain. In reality, both religion and science are expressions of man's uncertainty. Perhaps the paradox is that certainty, whether it be in science or religion, is dangerous. The danger of Dennett's relatively gentle brand of certainty is that it increases polarisation in our society. With inflexible positions on both sides, certainty surely is the biggest threat to rationality, and to science.