"Why do people begrudge immigrants who are happy to have those jobs?"
Hell my ancestors did those jobs too. They were coal miners, cooks, cab drivers, maids, refinery workers, etc. They were all LEGAL.
Why cant people come to this country to become American citizens FIRST and FOREMOST. All LEGAL.
Why do we reward those who couldnt wait in line to become American citizens, like all the millions before them? All LEGAL immigrants.
Do you want your children (or yourself) to do those jobs the rest of their lives?