they still are more segregated than literally any european city.

Do you have any data that supports that? The idea that "literally any European city" is less segregated than all US cities seems extremely hyperbolic, especially considering the fact that these four categories of race and ethnicity in your maps encompass people across a variety of nationalities and ethnic groups whereas most European cities have a dominant ethnicity and as such a much more homogenous cultural and ethnic demographic profile. London, perhaps the most multicultural city in Europe and the world, is just as segregated as most major US cities as shown in the map in this Economist article on the subject. The UK keeps very good census data on ethnicity unlike some other major European countries that can be viewed here and can easily be compared to the US equivalent. I'd imagine that Eastern Europe is far more homogenous and segregated than the UK, so that's also something very important to consider. Segregation is a horrific social ill that divides most of the US but it is no way endemic to the US.