This is purely false. Migrants as a whole are less likely to commit crimes than native-born citizens, and on average, they create more jobs than they take. They are 80% more likely to be entrepreneurs than native-born citizens.
https://www.cnbc.com/2024/09/28/are-immigrants-taking-jobs-from-us-workers-heres-what-economists-say.html#:~:text=Immigrants%20take%20jobs%20but%20they,become%20entrepreneurs%20than%20native%20workers.
And even undocumented migrants pay roughly the same amount in taxes as native-born citizens, while not being eligible for almost any of the welfare programs that exist in this country.
https://itep.org/undocumented-immigrants-taxes-2024/
The entire Western world is facing population decline, which is terrible for our economy and debt (as there are less young workers to support a system that requires them). More immigration is the best solution for dealing this--the head of the Federal Reserve has said so himself.
Not only are immigrants--legal or otherwise--not making this country worse. They are necessary for our continued success.
