A radical Islamic front, led by Iran and including Hizballah, Hamas, and al-Qaeda, is making a bid to expand its brand of theocratic rule throughout the Muslim world, with the aim of dominating the West as well. If the U.S. retreats in the face of this challenge, militant Islamism will advance. Israel may or may not be the first victim of this advance, but we will not be the last. As the 9/11 attacks illustrated, the Islamists have tired of pretending that Israel is their only, or even primary enemy. For an Iranian-dominated Muslim world, Israel is the hors d'oevre; America and Europe are the meal.