Eh, the GOP isn't a total monolith. Don't get me wrong, they have much better solidarity between themselves than the Democratic Party does between itself, but there's definitely a divide between the old school "I just wanna wring dry the working class and pump that money towards my donors and then go grill" Republicans and the new "jewish space lasers" Republicans. The former's interests are indistinguishable from capitalists' and so would only want an ethnostate if the capitalists want it (which they do, but not as an active goal, or we'd be in outright fascism with death camps for all non-whites already) whereas the latter I think would actively drive towards an ethnostate, ahead of the pack. The latter actually means it when they say that everything left of Reagan is socialist antifa anarchocommunism, whereas for the former, they don't really believe it, they just say it because it's required to get their base angry and voting.