From a WSJ book review:
Most European elites, though, have not debated seriously the potential effects of introducing into this land of postmodern chatter millions of devout believers in another religion, one previously seen as antagonistic to European culture. As Mr. Caldwell says, Europe's elites seem hardly to have considered that the ethical views they pride themselves on have little meaning when divorced from Christian origins.
Many Europeans are determined to defend their values— witness France's ban on headscarves in schools—but it is hard to defend what you cannot define. "There is no consensus, not even the beginning of a consensus," Mr. Caldwell writes, "about what European values are." When the Netherlands decided not long ago to try to define its values and inculcate them in prospective new residents, it ended up producing a ghastly naturalization packet that included a video that featured "gays expressing affection in public, and bare-breasted women on the beach." Welkom, immigrants!