In addition to the hypocrisy, being anti-immigration is an example of thinking about the economy as a fixed pie where immigrants are stealing a slice from citizens.
In reality, you can grow the size of the pie for everyone via entrepreneurship. The American economy and American people would be worse off if the father of Steve Jobs, Sergey Brin or Satya Nadella were not able to emigrate to the US.
It’s not like founding Google or Apple is a job that an immigrant steals from a citizen.

