This was an interesting and thought-provoking read. Maybe a bit too ambitious (covering all religions in under 180 pages is a lot to ask). The work is somewhat dated, clearly having been written during the Bush administration, and might need an update. The authors also use a lot of inflammatory language, which is helpful in catching attention but could detract from their overall message. And although this is supposed to be about religion in general, it's really mostly about Islam, with a dash of Christianity thrown in. But still good food for thought, more of a conversation starter than a definitive work.
That being said, my biggest criticism is that the authors don't provide suggestions for solutions or future action. This book does a good job of framing a problem, but that's not helpful if there's no where to go from there. The odds are good that the religious masses are not just going to renounce their beliefs and go strictly secular overnight - some form of religion is probably here to stay. And it's probably a stretch to say that organized religion is automatically evil - the authors do (grudgingly) acknowledge that "religion" is a complex entity, consisting of theology, philosophy, mythology, community, and politics/power/hierarchy, all of which unfolds and shifts across history*, and that there's also good mixed in with the bad. So given all that, how do we move forward? What can the the liberal religious do to affect change from the inside? What's the best way to support change in more conservative circles? If you're both religious and a woman, what can you do to lobby for change? Strides in gender equality have been made in education, government, business, sports, culture, and sex - why should religion be the exception?
And related to above, the authors don't discuss it but it sounds like there are some religions that got it "right," or religious sects that have managed (or are managing) to move towards less sexist, more inclusive stances. How are those groups doing it? Could they be used as a guide or map for other religions and sects? These are the things that we really need to know to tackle the problem.
Because the authors are so problem focused, it's easy to get mad and want to go out there and DO something about what really boils down to utter bullshit. But without a sense of what *can* be done, it'll just amount to a lot of directionless anger and frustration - and then what's really been accomplished here?
*[Segue: yes - religions evolve and adapt as a function of place and time, and those who insist otherwise clearly need to go educate themselves. Or, for the Christians, maybe actually go and read the New Testament].