"oh you couldn't POSSIBLY send Pakistanis in Rotherham, Rochdale or Bradford back! They've been there for decades! They're citizens and all!"
Okay, but what would happen if they WERE rounded up and sent back to Pakistan. Or sent to West Sahara, or Burkina Faso, or the surface of the Sun for all i care. What then? They'd just be gone and that would be all there'd be to it. And unlike for example the Königsberg of old, there'd be no wistful sense of a lost world. If anything, there'd be a sense of relief. No one would miss the rape gangs, the venal, inbred apes the cops and councils would tiptoe around as "community leaders", none of it. In due time, it would become a scarcely remembered thing that any Pakistanis ever were there.
There is a LOT to be observed with the postwar German expulsions. And it's a topic we should bring up a lot more, because unlike most other large scale deportation and expulsions, they've been carried out under the auspices of the postwar order, the same order we're told is defined by "antiracism", antinationalism and strict liberal individualism. And yet there, with express approval of global liberalism, there were mass expulsions that a) implemented the idea of collective guilt, b) the collective guilt followed strictly ethnic lines, c) no one pretended not to know how to define an ethnic group and d) the principle of ethnically uniform states very clearly overrode any economic or liberal ideas - genuinely productive and industrious people were kicked out, not barely sentient primitives like the third world biomass we're currently warehousing.
And it also shows that ethnic expulsions just work. There is no question of how to balance ethnic differences in Danzig, Reichenberg or Königsberg. There is no Danzig, Reichenberg or Königsberg.