Speaking as an (technically) agnostic (practically speaking, atheist), I've no use for religion; but I do think that the Bible, or the Koran, or any other such book can indeed be read both for insight and for pleasure. Depending, for one thing, on the translation. The King James version of the Bible, for instance, is an exquisite work of English literature. Many of the newer versions, however, are dreck. Period. They may have more "accurate" translations, but they are tiresome and about as entertaining to read as a badly-smudged list of ingredients on a cereal box. So, no, I wouldn't condemn any of the "holy books" outright ... just as guides for living one's life.
That said, I'm not too certain about the whole idea of condemning any book outright, as what some have found uplifting and inspiring, I've found pushing me close to slitting a wrist; and vice versa. It all depends on what the individual takes from a work; and so I'd be loath to put my own personal hatreds out there and possibly deprive someone who might have found something very important but for my opening my big mouth.