In the 90s, while still in the military, I worked with a guy who went back home for a high-school reunion (20 years). One of the folks he met up with....had been the son of a up-and-growing butcher in the local area. ‘Dad’ had decided in the late 80s to go after a big contract with a grocery chain out of Illinois. To make it work, he’d gone out and found a guy who could hustle up migrants from Mexico with butcher experience, and illegally brought them into the US, and ‘Dad’ had set up this compound in the middle of nowhere where they lived and worked.
The family business was clearing several million a year of profit, and avoiding social security, state/federal taxes, etc. All of this was playing into denying jobs to Americans, and helping the unemployment rate become corrupted. There are thousands of these operations around the US, and like you suggest....these people really don’t care about the US.
Which brings us to my other question. Why are our education systems failing to provide the kind of education and training that are needed for basic jobs? Then there would be less excuse for encouraging illegal immigration. It seems the current focus including the Trump education secretary are only focused on the college path.