Outside observer, but my understanding is that a big concern is that people from more illiberal cultures will make the nation more illiberal. There is also conc

Outside observer, but my understanding is that a big concern is that people from more illiberal cultures will make the nation more illiberal. There is also concern that making low skilled labor more plentiful will be harmful to the prospects of existing low skilled labor. A third concern would be that if the immigrants express an ethnic preference for their own community, this will cause increasing difficulty for existing residents. If you want to convince people that immigration will be in their best interest, I'd start by finding ways to ameliorate those concerns.