After a rash of "honor" killings, after the assassination of artists, after the burning of Parisian suburbs, and after a bloody furor over cartoons, Europe may start to get serious about its foolish immigration policies. It is not the end of tolerance, it is the beginning of intelligent preservation.
We are unabashed multiculturalists--we live in Silicon Valley and benefit from the wide variety of cultures which enliven and enlighten our community. However, we also never forget that, if governments are to exist at all, they not only have the right but the obligation to carefully select who they let into their country.
The consequences of Europe's importing of cheap labor, no questions asked, no obligations required, is to threaten the very foundation of liberal democracy. Of course, much of Europe's immigrant troubles are imperialist karma, with the populations of former colonies looking to the motherland after the invaders permanently destroyed their native homes.
Europe may not entirely grasp the concept of free expression, and old world attitudes (read neo-fascist) can register in the political mainstream, but let's not forget that most of Europe is forged in a socialist tradition that every American progressive should envy. Without the vast natural resources and natural isolation of the United States, most European countries have created remarkably free societies and robust economies, all the while insuring a vast social safety net: in human history, you rarely find governments which prioritize all three endeavors equally.
Europe's liberal immigration policies are as much a result of their progressive attitudes as every other aspect of their liberal societies. Immigration to Europe is necessarily inviting to those seeking political refuge as well as those seeking economic opportunity. Indeed, at times even the United States has exported some of its finest minds to European expatriation when our less than free society proved inhospitable to freedom. The same system which embraced and protected the world's great artists, scientists, and political thinkers has now become a portal for the enemies of civilization.
That said, the modernization of other Muslims, through immigration to Western countries, is not insignificant. For every disenfranchised Islamist living in a culture they despise there are hundreds of Salman Rushdies, Deeyahs, and other Muslims adjusting to modernity in their own way. This might be the way for modernity to seep back into the those Muslim countries of origin. Ultimately, young people will always reject the antiquated ways of their elders in favor of rock and roll.
Some reason needs to prevail over Europe's open immigration policies, and that reason should not be read as an end to progressive inclusiveness. It just means that a country has a right to decide who to allow into their homes.