Immigration harms specific industries.

Talk to short haul truck drivers. They cannot compete against illegal immigrants who do not pay their load insurance.

Talk to hotel housekeepers, which used to be a unionized job with benefits.

Talk to union construction workers, who cannot compete when contractors hire undocumented workers who work at a fraction of the pay, and are easily disposed when they get injured.

Talk to the thousands upon thousands of tech workers and developers and programmers that lost their jobs to H1B visas and had to TRAIN their replacements.

Why do we have an inability to train enough nurses and need to import them?

Functioning economy is a stretch. Not everyone goes to college. Why do you force young people to compete for their first jobs with older immigrants?

This is off the top of my head, and not some airy fairy myth I KNOW these people.

This sounds cold but not every potential immigrant's problems are our problem. Not every problem is our problem. The Americans who are hurt the most are the ones who need the low level jobs.