Ayaan Hirsi Ali argues in a book review published in the New York Times that it is not the West's allegiance to reason that interferes with our ability to understand and respond to the problems of tribal Islam.
Both the Romantic movement and organized religion have contributed a great deal to the arts and to the spirituality of the Western mind, but they share a hostility to modernity. Moral and cultural relativism (and their popular manifestation, multiculturalism) are the hallmarks of the Romantics. To argue that reason is the mother of the current mess the West is in is to miss the major impact this movement has had, first in the West and perhaps even more profoundly outside the West, particularly in Muslim lands.
Thus, it is not reason that accommodates and encourages the persistent segregation and tribalism of immigrant Muslim populations in the West. It is Romanticism. Multiculturalism and moral relativism promote an idealization of tribal life and have shown themselves to be impervious to empirical criticism. My reasons for reproaching today’s Western leaders are different from [the author of the book being reviewed]. I see them squandering a great and vital opportunity to compete with the agents of radical Islam for the minds of Muslims, especially those within their borders. But to do so, they must allow reason to prevail over sentiment.
Worth reading in its entirety.