In some instances, particularly in the American South and in some European cities, a large influx of immigrants has proven disruptive to local culture as well.

But as the son of a roofer, I can confirm, #1 has historically been an issue. My dad's business, when he was still able to roof houses, was often undercut by illegal crews giving lower bids.

Of course the answer is a legit path to citizenship and resources to help people assimilate more easily and without fear, not Gestapo shit, but immigration, like abortion, is an issue that is purposely never resolved, and it never will be. This is a golden goose issue for Republicans, just like abortion is a golden goose issue for Democrats. They simply make too much money in donations and are able to grift all the public money they want in order to pretend it's being solved, and therefore, have no real motivation to fix it.