I just listened to the good RSA symposium between Denkins and Alister McGrath about Dennet's book Breaking the spell of religion. I think one of the most interesting points demonstrated was the failure to admit to the prejudices of one's own belief system is the surest way to believe you have the winning argument. I think antagonism towards religion only proves this point. The degree to which religious like beliefs are mocked is often correlates to the degree to which someone is blind to the circular nature of their own belief system. This isn't to say some modes of thought are better at certain things than others, only that we tend to forget that individual priorities mean what we value may not be the same as someone else. Hence the circularity caused by background perspectives.
While Dennet is much broader in his definition of religion than most, McGrath's meme critique seems to assume a broader definition still. It seems to define religion in terms of faith claims rather than the supernatural. Therefore memes theory functions in a similar role as god, albeit in a much more palatable way for society. In relation to this, Dennnet raises a very interesting point, science has evolved a way to largely remove bias from its findings, making it able to escape endless cycles of handwaving.
With this possibility, I find it ironic that so many people who attack religion seem to do so in rather religious like fashion. I would suppose, from Dennet's position, atheism or feminism becomes becomes no different from traditional religion as long as they are unable to find tools to remove the inherit biases their own memes engender. Perhaps it is as McGrath says, any organization has its fanatical elements. Today's problem with religion may not be as much what it is about, but rather how it is perceived, presented and used.