Amir Taheri has a good column explaining why Paris is burning. For too long the French have let these neighborhood enclaves of Muslim immigrants grow into areas where the French government, culture, and language do not penetrate. Unemployment and radical Islam predominate and the French have turned their gaze aside in hopes that nothing bad will happen. Now, they're finding out that they have an emergency on their hands and no way to deal with it.

As the number of immigrants and their descendants increases in a particular locality, more and more of its native French inhabitants leave for "calmer places," thus making assimilation still more difficult.

In some areas, it is possible for an immigrant or his descendants to spend a whole life without ever encountering the need to speak French, let alone familiarize himself with any aspect of the famous French culture.

The result is often alienation. And that, in turn, gives radical Islamists an opportunity to propagate their message of religious and cultural apartheid.

Some are even calling for the areas where Muslims form a majority of the population to be reorganized on the basis of the "millet" system of the Ottoman Empire: Each religious community (millet) would enjoy the right to organize its social, cultural and educational life in accordance with its religious beliefs.

In parts of France, a de facto millet system is already in place. In these areas, all women are obliged to wear the standardized Islamist "hijab" while most men grow their beards to the length prescribed by the sheiks.

The radicals have managed to chase away French shopkeepers selling alcohol and pork products, forced "places of sin," such as dancing halls, cinemas and theaters, to close down, and seized control of much of the local administration.

A reporter who spent last weekend in Clichy and its neighboring towns of Bondy, Aulnay-sous-Bois and Bobigny heard a single overarching message: The French authorities should keep out.

"All we demand is to be left alone," said Mouloud Dahmani, one of the local "emirs" engaged in negotiations to persuade the French to withdraw the police and allow a committee of sheiks, mostly from the Muslim Brotherhood, to negotiate an end to the hostilities.

President Jacques Chirac and Premier de Villepin are especially sore because they had believed that their opposition to the toppling of Saddam Hussein in 2003 would give France a heroic image in the Muslim community.

That illusion has now been shattered — and the Chirac administration, already passing through a deepening political crisis, appears to be clueless about how to cope with what the Parisian daily France Soir has called a "ticking time bomb."

It is now clear that a good portion of France's Muslims not only refuse to assimilate into "the superior French culture," but firmly believe that Islam offers the highest forms of life to which all mankind should aspire.