I was listening to the local NPR talk show today, and they had several hispanic leaders on the show... one from LULAC, a journalist, and some other person. I was really suprised by the journalist (3rd generation Texan) and the LULAC rep (5th generation Texan). They were LIVID about the mexican flags at the rally in Dallas. They said that it was completely inappropriate to wave the flag of a foreign country when marching for rights in THIS country. They also addressed the bi-lingual issue. The journalist was most adamant about "This is America, don't ask me to translate a test for you... Learn english".
I don't know whether they truly represent the majority of hispanics, but what they were saying is what I've heard said by about 75% of the kitchen staffs that I've worked with, and most kitchen staffs here are 98% hispanic.
/johnny