Should Europe be an American-style Melting Pot?

Geoffrey Wheatcroft in the Boston Globe:

1134234520_2130In the United States and the European Union, immigration, assimilation, and identity are now the hottest of political topics. But if they illustrate a profound transatlantic gulf, they also reveal sharp differences within the European countries in their experiences of immigration and their responses to it. Although some Frenchmen were quick to point out that no one was killed in their latest outbreaks, by contrast with riots in America in 1992, any honest European must ruefully admit that our experience of absorbing immigrants into the community over the past 60 years compares in many ways unfavorably with the American experience. What went wrong?

More here.