[Yetanfou]

...but if you import an ideology into your culture you'll end up with escalating conflict. The refusal to see this has created something more akin to a powder keg than a melting pot (to paraphrase the old moniker) which has the - already partly realised - potential for some serious destruction.

[guerrilla]

You realize all of the larger cultures on Earth are melting pots, right? Sweden, France and Germany each by themselves are cultural mutts, for example. To deny this is to deny history and archeology.

[Yetanfou]

The "melting pot" idea of multiculturalism has been proven to be inaccurate, a better term for the way things actually work is a "salad bowl" - just search on "melting pot or salad bowl" to read more on this subject.

The example of Sweden is indicative of what I tried to convey as it has made the "salad bowl" concept part of its constitution which states that the country should "actively promote the distinctive collective identities of national minorities and immigrants" ([1] gives some insight in how things came to be like the way they are in Sweden). In the space of a few decades the country went from being one of the most homogeneous on earth to a boiling kettle of contrasting and often clashing cultures to which the term "mutt" - a mixed breed which has characteristics of all its predecessors - is not applicable as the constituent cultures mostly hold to their own. It is at the interfaces between those cultures tensions arise, sometimes between native Swedes and immigrants but more so between different groups of immigrants.

[1] https://www.jstor.org/stable/10.3366/j.ctt20q22fw.13 ("The Political Dynamics of Multiculturalism in Sweden")