Personally, I'm not against Latino immigrants at all, even the illegal ones, mostly because if I were born poor in Latin America, I'd probably try to come here myself, legally or otherwise.
I do resent the leadership of Mexico and Central America, though, for not making more of an effort to get its population to control its birthrate, and for what sometimes seems like its indifference to its need to create a middle class.
America can't forever absorb Latin America's excess population. I wish we could. The solution to the problem, if there is to be one, has to be with evolution in Latin American societies. And it doesn't seem like the will to make that happen exists-- probably because the leaders of those countries assume the safety valve of emigration will always exist. That was a safe bet ten years ago, but now, it's become an issue, and it seems inevitable that at some point, it's going to come to a head.