Christopher Caldwell's Reflections on the Revolution in Europe looks like must reading. An excerpt from The Wall Street Journal review:
In his reflections on Europe's slide into a sort of secular suicide, Mr. Caldwell notes the key role played by that most religious impulse: guilt. He argues that the dominant moral mood of postwar Europe was "repentance for two historical misdeeds, colonialism and Nazism." Over the decades, guilt has festered into "a sense of moral illegitimacy" and a "self-directed xenophobia" that now shapes the continent's response to immigration.