Fox News and CNN's Lou Dobbs worry about terrorists stealing across the United States' border with Mexico concealed among illegal immigrants. The Pentagon wages war in the Middle East to stop terrorist attacks on the United States. But the growing nightmare of officials at the Department of Homeland Security is passport-carrying, visa-exempt mujahideen coming from the United States' western European allies.
Jihadist networks span Europe from Poland to Portugal, thanks to the spread of radical Islam among the descendants of guest workers once recruited to shore up Europe's postwar economic miracle. In smoky coffeehouses in Rotterdam and Copenhagen, makeshift prayer halls in Hamburg and Brussels, Islamic bookstalls in Birmingham and "Londonistan," and the prisons of Madrid, Milan, and Marseilles, immigrants or their descendants are volunteering for jihad against the West. It was a Dutch Muslim of...