Water cooler quote heard in my office today:
"I don't care if they come to American and want to be Americans. I have a problem with them coming to America and wanting to be Mexicans."
Indeed! Unlike the immigrants before them whom they often refer to, they seek to transplant Mexico here instead of joining the melting pot, learning English, and getting with the existing program.
If you ask me, probably the single worst thing about them coming here is that they utterly ruin neighborhoods by moving 2-4 entire families, often 20 or so people, into a single house. Apparently there's nothing that anyone can do about that. But who wants to live in a neighborhood with residents like that. It ruins the neighborhood and reduces property values.