a sh*ithole without any importance to the US
I already told you - you don't understand US history. America does only what's best for America in the long run. Always has been, always will be. If it takes dropping nuclear bombs on civilians - nuclear bombs are dropped. If it takes invading any country under any pretext - this country is invaded. That's what America does and there's nothing that such insignificant grumpy old man, with zero importance, like you can do about it.
millions of Uks that will never leave
Millions of white, Slavic Christians, who are hard-working and learn to speak Polish with the speed of light? Brilliant :) Especially that Poland has been experiencing demographic decline for many years now.
nobody in the West wants them
No, the West prefers Latinos and millions of Arab and African "doctors and engineers",
so everyone gets what they want. Brilliant :) In general I think that such pattern of immigration should be established for the future:
1. Estados Unidos dellas Americas Northernas gets all the Latinos from Central and South America (there's a huge supply, you won't run out).
2. The west of EU gets all the Arabs and Africans.
3. Poland gets all the millions of Slavic people (Poland is the Big Mother of All Slavia anyway - ask Crow).
4. The UK gets everyone from the lands of former British Empire - so mainly all the Hindus, Pakis, Banglis etc.
There has to be some sort of order and division in immigration and the above seems logical. You don't have to thank me - happy to help. :)