No that is 2 very different mono-culture attempting to eliminate the other
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.
I think that's a vast overdramatization based upon reading the most fringe elements into everything else. The reality is the vast majority of people exist well within the edges and aren't anywhere near as fatalistic as you describe
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.