Well shoving 40 million americans into ireland would make it essentially a mini usa, or are they not allowed to get voting rights because that would kinda bigoted, would it not? Because I doubt too many of them would become based communists after they get kicked out of their homes (no matter how justified that action might be).
Unlike Muslims who arent a monolith, dont come from a single country, are not riled up white supremacists now displaced, wont be in double digit millions. To believe 40 million displaced angry american refugees won't change ireland on a fundamential level is certainly a take. Even worse in many other european countries where it will just bolster white supremacy ("see the west is under attack now" and all that). Maybe the word choice of "mini-usa" rings of chud language, but it would be true, similarly if said oh lets send 70 million germans to bolivia, then it would be logical to assume that they would create a "mini germany" there, would it not? Such an massive amount of people can not be given adequate homes, welfare, jobs, public housing/schooling/transportation in a humane enough time.

Depending on the scale and the areas where . Given that in countries like the united states you cant not have an revolution without the euro-american population (its simply is too large), Canada, Australia or the US will never be Algeria, Rhodesia or Haiti, the issue how to deal with that is something that the local communists need to find a satisfying conclusion to, an conclusion will not lead to them to face millions of armed militants waging warfare against a central government trying to relocate them.