I would disagree. Perhaps it is the way I see Multiculturalism.
From what I can tell, there are two distinct methods to introduce immigrants into an existing society: The Melting Pot Method, and the Multicultural Method.
The melting pot method requires immigrants to assimilate themselves to the society they are entering. They learn the language, customs and rules of the society they are entering. This, historically, is how any arrival has been integrated into a new environment, from a guest into a home to a person into a country. There is no requirement in most cases (but not all) to disown or denounce previous customs, languages or cultures, but they are generally not given the primal importance they had in the previous environment.
The Multicultural Method states that you do not need to assimilate. You can live exactly as you did from whatever environment you sprang from, you can keep your language, your customs, and even in some cases (most dangerously) your rules. Society is expected to value your uniqueness or "differentness" and bend over backwards to accomodate your characteristics.
I believe that the multicultural approach, with bilingual education, driver's license applications in 40 languages, required intepreters on demand in any language in every hospital, and so on.
You said what I tried to say in my post in a much more eloquent manner. Perhaps you've had more coffee than I have today?