David Cameron, the British prime minister, declares the policy of multiculturalism to be a failure. It has marginalised people from the main culture, and it has sent the message that it’s okay to live disconnected from the central culture. Moreover, it provides incentives to disconnect from the sustaining culture of liberty and democratic values. See a portion of his speech here in a report from the Daily Telegraph.
Our own Salim Mansur made a very similar argument a few days ealier here in Canada.