Surprise, I live in a boarder state, and I can attest to this statement. I've been in business at the same location for over 20 years and have more that a few customers that have been with me that long that refuse to speak anything but Spanish. How one can live in the US that long and still refuse to admit they speak any English is baffling. Mind you, they're nice people, just refuse to join the great melding pot that is the USA.
Here's my opinion about the Hispanics, many, not all, don't want to assimilate, they choose to bring their culture, language and lifestyle with them and expect the USA to change for them.
It seem to be unique to this culture, as there are also a large influx of Vietnamese and Indian migrants in my area as well. But the government placates the Hispanic population by printing any official government document in Spanish as well as English. Why not Vietnamese or Indo Ayran?
They come to this country uneducated and unskilled, just as many of our own ancestors did. But here's the big difference, when our great grandparents arrived from Europe, legally, at the turn of the 20th century this country made things and there were factory jobs for them to provide for their families. And they wanted to be Americans. That, for the most part, in my opinion, is no longer the case.
People always point to the cost of a wall and defending our southern boarder, but it's a small price compared to the expense paid by healthcare, schools and general taxpayers for those that choose to come here illegally.
I also think slapping businesses hard that hire illegals would go along way toward solving the problem as well.