Check out this excellent essay from The American Spectator, "Multiculturalism, R.I.P," by Roger Scruton, philosopher and author of Culture Counts among others. In the wake of some European leaders like Germany's Angela Merkel openly acknowledging the damage done by decades of multiculturalism, Scruton pronounces it "a recipe for disaster" and worries that "this change of heart comes too late."
Here's the money paragraph:
FOR WHAT IS BEING brought home to us, through painful experiences that we might have avoided had it been permitted before now to say the truth, is that we, like everyone else, depend upon a shared culture for our security, our prosperity and our freedom to be. We don't require everyone to have the same faith, to lead the same kind of family life, or to participate in the same festivals. But we have a shared moral and legal inheritance, a shared language, and a shared public sphere. Our societies are built upon the Judeo-Christian ideal of neighbor-love, according to which strangers and intimates deserve equal concern. They require each of us to respect the freedom and sovereignty of every other, and to acknowledge the threshold of privacy beyond which it is a trespass to go unless invited. Our societies depend upon a culture of law-abidingness and open contracts, and they reinforce these things through the educational traditions that have shaped our common curriculum. It is not an arbitrary cultural imperialism that leads us to value Greek philosophy and literature, the Hebrew Bible, Roman law, and the medieval epics and romances, and to teach these things in our schools. They are ours, in just the way that the legal order and the political institutions are ours: they form part of what made us, and convey the message that it is right to be what we are.