It's all women's fault
I have a very good friend who claims that the Islamists' fundamental problem with the West is how well the West treats its women at all levels (economic, social, sexual, political, whatever). All other thing, he think, could be forgiven, but Islamists cannot forgive a culture that has given up control over women. In traditional Islamism, of course, women are seen as an extension of a man's honor, as commodities, as providers of boy children, and as the one thing that can take a man, no matter how low, and give him the illusion that he is better than someone else. In case you're wondering about the truth of my last assertion, you should read this essay by Badriyya Al-Bishr, asking men to imagine being a woman in Saudi society. Then think about the fact that Muslim groups have been totally open about the fact that they'd like to reestablish the Caliphate and bring sharia law to every country in the world.