Quote from AAAintheBeltway:
You are partly correct. The question is, do we want our largest cities filled with uneducated illegal immigrants who root for their old home team?
Do you really think a large group of americans living in mexico would go to say, an american football game, and boo the Mexican anthem and shout insults at the native players? Isn't that the real issue? If they hate the US so much, why are they here and why do we tolerate their presence? How can it be a good thing for the country?