For arguments sake - is nativism inherently immoral?
It depends on what kind of world you want to live in, I suppose. It certainly isn’t egalitarian or inclusive, and I would argue it’s not very far removed from racism. The real debate would be around what amount of “us versus them,” favoring your chosen social group over all outsiders, is acceptable.
Is the morality what's in question here? To me, it seems nonsensical, as evidenced by the logical conclusion: no people should move from any city to any other city.
That's sort of the whole point, though. Long-time Portlanders are frustrated at getting priced out of the rentals they live in, as rents increase faster then their salaries increase because of newcomers competing for the same supply.