An Irreverent 'Go To Hell' Joke

A Russian arrives in New York City as a new immigrant to the United States.  It's 11:00 AM on a Wednesday.
He stops the first person he sees walking down the street and says, "Thank you Mr. American for letting me come into this country, giving me housing, food stamps, free medical care, and a free education!"
The passerby says, "You are mistaken, I am a Mexican and here illegally."
The man goes on and encounters another passerby. "Thank you for having such a beautiful country here in America."
The person says, "I not American, I Vietnamese and here on a Green Card that expired two years ago."
The new arrival walks farther and stops the next person he sees, then shaking his hand, and says, "Thank you for wonderful America!” That person puts up his hand and says, "I am from Middle East.  I am not American.  It was easy to get here via Arizona."
He finally sees a nice lady and asks, "Are you an American?"
She says, "No, I am from Africa here on an Education Green Card that expired 10 years ago."
Puzzled, he asks her, "Where are all the Americans?"
The African lady checks her watch and says: "Probably at work."