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.

Yes, immigrants drive down wages is the biggest issue. The second is if you bring in a large enough glut of 1 type of immigrant all at once (like refugees for a real world example) they can establish an insulated community and not actually join "the mixing pot."

There are obviously a lot of positives and neutral points as well, but everything has a give and take. The biggest positive is that children are a pure drain on society but an immigrant doesn't need schooling or rearing. They can simply begin working (for that lowered wage).

also, the simple fact that more people looking for somewhere to live means less accessibility to that housing if supply is fixed

3- housing and rents go up in every city with more migrants because it's workers who just want to rent now right here at any cost compared to a city where people settle in owned houses.

4- they sent most of their earnings outside to their countries to help their families there compared to citizens who pay it all on their local economy. and if they were illegal, not even pay taxes while using and benefiting from most your services. However, the true leechers who pay no taxes are in fact the super wealthy.

In a broader picture again, it's actually corporations and property owners who benifit the most from illegals or cheap migrant B-visa workers, and crowded cities and higher rents and housings. So ironically the rich are the ones who benefit from immegrants the most specially in areas with high local unemployments and low wages. Then they use the narrative that these dirty unassimilated immigrants who dont speak your language or share your culture are ruining your city to distract the blame from them.

There's also the fact that whether or not the undocumented are illegally voting in national elections, states currently receive representation in Congress based on their total population, not citizen population. Which is a strong motivator for blue sanctuary states and cities to want open borders, and for conservatives to push for legal deportations. This is a power struggle.