Have to say that was very interesting, although I'm not sure exactly what good the author is suggesting. He seems to believe that the islamic world could not and should not be secular, that there should not be religious debate amongst those "not qualified to do so".
The interpretation of the reformations in europe also seems flawed. It did lead to fighting (bad), and the removal of many a fine work of art, but also started the end of religious authority over the state, its rules, and the people. Began the path to democracy and allowed the questioning of religion and its practises - the adaption of laws into the contex of modern life and social change. Are these really that bad??
Point that whenever we talk about intergarting we must accept that any intergrater is fully aware they don't really 'belong' to the culture and its history i, i have to say, pause for thought.