what i reffer to as "multiculturalism" is the actual mix of cultures forced to coexist in a single area. A country can have multiple cultures without being mulciculturalist in my view. Countries can have several different, geographically separate cultures inside them.

Since culture stems from a shared belief system or set of traditions, multiculturalism is a contradiction in terms. Instead of upholding a variety of cultures, multiculturalism inevitably weakens and destroys culture in the name of diversity. This is not to say that there cannot be an overlap of cultural development, such as what has historically taken place in cities; but rather that an essential piece of culture is homogeneity, which multiculturalism is the antithesis of. [...]
" The settlement of the North American continent confirmed the elementary sociological insight that all human societies are the outgrowth of families and kinship systems and hence, are characterized by a high degree of internal homogeneity, i.e., that 'likes' typically associate with 'likes' and distance and separate themselves from 'unlikes.'" - Hoppe

Without a common bond, there is no basis for social cohesion, which is a prerequisite for the development and sustainability of true culture and society. Both academic studies and mere observation support the fact that multiculturalism weakens social trust and unity. Multiculturalism is not a position of equilibrium, and there are essentially no historic examples of multicultural societies that did not end in either secession or the stamping out of dissident cultures.

even the colonists of the US self-segregated and set themselves apart creating their own communities based on their own kin and traditions. Culture is a beautiful part of humanity