You may find John Gray interesting. His view is very roughly that secular humanism and the ideals of the enlightenment, especially the idea that moral and intellectual progress should correlate, are extensions rather than disownments of religious dogma.

Here's a taste of his kind of take on things - http://www.newstatesman.com/ideas/2009/12/past-decade-world-...

I would strongly recommend his book Straw Dogs, though it is very polemic in style.