Multiculturalism as a sword to fall on

Mark Steyn wraps up an amusing article about the self-loathing of British multiculturalists with the following indictment:

But 'multiculturalism' is really a suicide cult conceived by the Western elites not to celebrate all cultures, but to deny their own. And that's particularly unworthy of the British, whose language, culture and law have been the single greatest force for good in this world. This isn't merely a question for the history books, but the issue that underpins all the others facing the country today, not least the European Constitution: at a time when the benefits of the Britannic inheritance are more and more apparent everywhere else, how come Britain has no use for them?