As you can see, there are many mixed answers. I think "the person - "The Violater" comes closest. Throughout our history, as immigrants from other countries came enmasse to the USA, they were seen as forigners, and taking jobs away from "real" Americans. And as each wave came the bigots whipped up hate against the new comers. The Chinese came to help build the transcontinental railroad, then during a slump in Europe's economy and the potato famine in Ireland brought the Irish, Jews, Swedish, Norwegians, Italians, Germans, and Brits. These were all processed legally into the US, but they were still hated and treated poorly. World War II caused a lot of racist sentiment for the Japanese, as in the US they were all rounded up and put into interment camps however, even though we were fighting the Italians and Germans, none of those citizens were locked up, but were still hated or mistrusted. The Cubans and Vietnamese came to the US as refugees and the USA provided for them, but still there were always people and politicians that did not like them either blaming them for all sorts of evils and burdening the tax payer.
The Mexicans are a bit different than these other immigrants because they live next door and it's easier to sneak across the border. If you are in China or Korea sneaking into the USA is a lot more difficult. There are some Americans who really hate the Mexicans who sneak across our borders because they become a burden on the US tax payer and that's what they are upset about. And there is an irrational fear that the illegals are taking jobs away from Americans. Since most of the Mexicans who sneak across the border are not professional workers, they are those who do the lowest paying jobs that only the poorest of Americans do. If Mexico's Economy was strong there would be little issue with illegal border crossing. However, the poorest in Mexico can see that they can make a better living here in America by harvesting crops and wroking for less than the minimum wage. If I were a Mexican and had a family to care for and was just barely making it, I would sneak across, too.
To come to America, it takes three to five years of waiting, and some are never processed at all. This is clearly the Government's fault. Some Mexiacns can't wait that long to survive. All of the cost of the illegal entry to the US tax payer is a drop in the bucket compared to the two wars we are waging and all of the tax breaks given to corporate interests. It seems some people always have to ***** about something like illegal Mexiacns, when they are being robbed blind behind their backs by corporate America that continues to buy politicians to look out for thier best interests.