Let them check out Corona, Queens for illegal Hispanics, upper Flushing, Queens for illegal Chinese (who are taking over all of Queens), Brooklyn for illegal Slavic country criminals and the Bronx for illegal South and Central American criminals. I’m sure they will find hundreds, if not thousands.
What I'd like to see next is for qualified US citizens who are unemployed or underemployed come forward and demand to know why corporations are getting work visas for foreigners when there are available and qualified US citizens to fill those jobs.