Most of the hispanics I know who are legal in this country are against illegal immigrants. I interact with a lot of hispanics.
As a hispanic, yes I have heard these comments much too. But I am in South Florida with a different mix of immigrants than the southwest US. It irritates me to hear sometimes, as a US born person with the ease with which immigrants from some countries have in legally coming to the US, when they comment on people from other countries that have a harder legal path to come to the US. Seems hypocritical.
And although I'd like to see more of these immigrants allowed in, there is a financial cost to it and an influx of people at the lower end of the economic scale affects the poor in our country (US). So I really don't have an answer.
The complexities of the process are what bug me. My sister works as a paralegal in immigration so she knows the laws better than me.
I have a friend that was dating someone from a country in South America that immigrated to the US to study (all legally). He graduated college and even got an MBA. He had hired a lawyer to handle his application to become a citizen. He was working as a consultant for some of the top firms and was travelling all over the world, being a very productive citizen. Well then, he planned a trip with my friend in the Caribbean and proposed to her on the trip. On that very same trip back, he got arrested at the airport because apparently his lawyer was a crook and had been taking his money and wasn't submitting any of his papers and did it to others and they were finally cracking down on it. So then he spent 6 months in an immigration jail and was pretty sure he was going to get deported. My friend and he were already planning what to do. She loved him so she figured they would have to move to a third country. They even got married legally (not in a church as they wanted) while he was in jail. Thankfully, due to his good character and spending lots of money on lawyers to get him out of the jail he was allowed to stay and they eventually got married in a church. They kept all of this from their friends because they were so embarassed by it. All I knew was that he was never around and she'd say he was travelling for work. But in reality he lost his job and all because of it. Happy ending...he got his citizenship and they are very happy. Even before this, he was the biggest American flag waving person you could meet.
And I don't think we should just look at immigrants as to what economic value they can bring or just people with skills. What happened to the text we have on the Statue of Liberty: "Give me your tired, your poor, your huddled masses yearning to breathe free".
To me, the American Dream is about freedom. All of this talk of the American Dream being a big house, good job, unlimited food...sounds great and all but the core of the dream is to be free to be what you want, regardless of your family background, which political party you belong to, and to be free to express yourself and pursue your dreams. Pretty much what the Bill of Rights lays out. Everything else is just gravy.
EDIT: I wanted to add that I also work in software, so I work with many immigrants from other countries. The ones that come here legally complain all of the time about how hard it is for them to come here and then they see the lax attitude towards those not using the legal process. There's probably going to be a big backlash on this whole topic.