For future reference to the forum. This is what happens when he's been bested. He lumps you in with a group of people as an attempt to blow off your argument or insult you. (I'm neither a democrat nor am I for an open border

)
Now for my rebuttle:
What does going back to Mexico do for him? Nothing. It takes him back to square one. That totally defeats the purpose of him coming to the United States and gaining citizenship.
One Mexican-American family leaving the state doesn't mean much to the Arizona economy. If all the Mexican-Americans in Arizona or the Southwest United States were to leave, that would have an impact. But once again, why would they do that at all?
And what if he is proud to be a Mexican-American? It isn't hard to see why that's possible. Walk into an Italian neighborhood in NYC or a Polish neighborhood in Chicago. You won't see many American flags.