The larger question, though, is whether a nation is any more than a geographic entity. If some Parisian Rip Van Winkle wakes up one distant morning and finds himself in a nation that speaks Arabic, where the people are Muslim, food is by law halal and the government follows Sharia law. Is that fellow still, in any meaningful sense, in France? Is it simple racism for, say, the Dutch to want their nation to stay Dutch -- not just in terms of geography -- in terms of language, food, religion, government, architecture and all the things that make up a...