The concepts of pluralism, tolerance, and peaceful coexistence with people whom we disagree is replaced with forced acceptance, mono-culturalism, speech controls and a rank intolerance of opposing views often supplanted with a rather obtuse perversion of the "paradox of tolerance" where by intolerant people of both political sides justify their actions actions as morally and ethically correct, as being on the "correct side of history" or other such platitudes
Ergo: if you treat everyone around you with the respect and recognition of their personhood, you in turn are 100% entitled to that same respect and recognition. If however you make statements or act in such a way as to diminish the personhood of others, you are no longer entitled to that respect.
I think it's a nice little system and resolves the paradox quite nicely. To promote a tolerant society means being intolerant of intolerance.
The right is most seen on this in the modern era Womens Rights, Schools, Gay Marriage, etc
The left is most seen on this with Speech Codes around "Hate Speech" and Pronouns, in Employment Regulations, in Equity Regulation (enforced by law not market) ,etc
You seem to believe that because 2 cultures exist it is "multicultural" but that is not the reality, "multicultural" would be accepting the other culture as equally as valid as your own, tolerating their existence in a legal and market framework (i.e willing to do business with them, and not use government power to make their culture illegal)
What we have today is 2 cultures attempt each attempting to banish the other both using markets, and using governments.