Slamming the door is a bit much. GtD's approach is better, but he is mistaken when he says these people mean no harm. Dawkins has argued convincingly, and in fairly scientific terms, that religions as viruses of the mind.

Better than any book cited so far is God is not Great by Christopher Hitchens, of whom Richard Dawkins wrote: "If you are a religious apologist invited to debate with him, decline." Reviewing the book, Dawkins added: "With characteristic effrontery, Hitchens took his book tour through the Bible Belt states - the reptilian brain of southern and middle America, rather than the easier pickings of the country's cerebral cortex to the north and down the coasts. The plaudits he received were all the more gratifying."