The movie is quite interesting and informative, but I think its flawed a lot, unfortunately.
You can't compare a religion to a country, its like comparing apples with papayas. he asked whether islam fits into the secular, liberal, free British society, and the answer is no. But again, would Christianity fits with these rules? would a true christian accepts premarital sex? would he accepts homosexuality? would jodaism accept them!? No. He asked questions and got answers for not only Islam, but also Christianity and Judaism. He should have asked questions regarding specific verses in the Koran that DO contradict with the values and quality of life of the british society. One example would be the beatings of women in Islam, or the multiple marriages.