[Capricorn2481]

You are completely dodging the topic of assimilation. You are implying that Japan is great because it's culturally homogeneous, and the reason it's culturally homogeneous is because people assimilate, and therefore Sweden deporting teenagers is morally right because they are protecting their own culture from people that don't assimilate.

You have no specifics on how immigrants don't assimilate, and what part of the culture is worth preserving, or how you can even assimilate to a culture that is constantly developing. If I am ethnically Japanese and grow up in Japan, but I don't act like others, that is not a "lack of assimilation." That is me actively participating in a shift of the culture, and that's how everyone would see it. But if I were a different ethnicity in the same situation, I would be a problem immigrant anchor baby who is trying to destroy the culture of the country. Do you see the difference?

This idea that culture is able to be frozen in time and preserved is paradoxical. It's a cudgel used to bludgeon disadvantaged people who are perfectly functioning citizens, and even harm people who could make the country better, not worse. How do you expect immigrants to introduce new ideas to a culture if you elect politicians that will demonize and deport them if they are not sufficiently "assimilated"