French President Nicolas Sarkozy has ramped up the anti-immigrant rhetoric in recent days, telling a TV audience last week that France has "too many foreigners" and offering to cut the number of immigrants admitted to France by half should he be re-elected to a second term. Then on Sunday, before a monster rally in a stadium near Paris, he threatened to suspend France's participation in Schengen, Europe's internal borderless-travel zone, unless it is reformed to better keep out the great unwashed.

Even in France,...