The typical argument supporting more Third World immigration into America is that we "need" the cheap labor. Many White suburbanites hire Mexican maids to do their housework and Mexican gardeners to mow their lawns. Many old White people are sent off to nursing homes, where the nurses are all non-Whites. It isn't really necessary to flood America with Mexicans because Yuppies are too lazy to do their own house work, and old White people deserve better than to be neglected by non-White nurses.
While it is true that America benefited from cheap immigrant labor from Germany, Ireland and other European nations during the nineteenth and early twentieth centuries, there is a significant difference between how those people became assimilated into all levels of American society while Mexican immigrants tend to cluster at the bottom.
Immigrants from Europe have a greater intellectual potential than Mexicans or Blacks. (White people have the largest average brain size, and intelligence tests consistently show Whites scoring much higher than Blacks or Mexicans on average.) Many of the children of European immigrants went on to become doctors, scientists, and businessmen. In the case of Third World immigrants (with the exception of northeast Asians) the children of most of these immigrants are best suited for manual labor. Very few of them have the intelligence to move up to professional class jobs. Unfortunately, the work ethic of Mexicans appears to fade very quickly from the immigrant generation to the second generation Mexicans. First generation Mexicans tend to be relatively good workers, but their children have a high percentage of gang bangers, drug dealers, career welfare recipients, and disgruntled Chulos with bad attitudes, not much better than the average Black.
So do we just keep repeating the process of bringing in two or three million new Mexicans and south Asians every year, and then, when their children turn out to be mostly useless, do we let in millions more? Won't the tax burden eventually cripple the nation? Not only will the tax burden cripple America, the increasingly large minority voting block will put the worst socialists imaginable (Hillary) into power, and Whites in America will be so badly oppressed that they'll envy the Palestinians in Israel.
While first generation Mexican immigrants do provide cheap labor, there are many hidden costs involved. Hospitals will routinely charge as much as 15,000 dollars for every birth, and Mexicans love to have big families. The average first generation Mexican, earning six dollars per hour, is unlikely to have 15,000 dollars in his pocket (or even medical insurance) so this substantial sum gets transferred over to the (mostly White) taxpayers. Soon the public schools are overrun with Mexican children, your property taxes double, and you have to pay for private schools just so that your kids can get a decent education in a classroom with less than one hundred students.
America in the 1950s was a successful industrialized society that was ninety percent White. The average White society (with a competent government) produces slightly more jobs than its White population can fill. America had almost full employment in the 1950s. Mexican and Black societies, however, fail miserably to produce enough jobs to get anywhere near full employment. Black-run nations in Africa and Mestizo-run nations in Central America with their shanty towns and crumbling infrastructure are the worst examples of mass unemployment and poverty in the world. As the percentage of Mexicans and Blacks continues to grow in America and their role in government increases, America will transition from a prosperous, industrialized nation to a Third World nation. Taxes will have to climb ever higher to support the minority population and to offset the increasing incompetence and corruption in both government and business. Eventually, people driving across the Mexican border will notice no difference from one side to the other.
America could have continued as a highly prosperous, stable, segregated society beyond the 1950s if racial differences were still honestly recognized. From about 1872 until the 1950s, racial differences were honestly recognized by most Whites and most politicians. The American South in the 1950s had segregated the Blacks to protect White women from being raped and to protect White people from being mugged or killed by Blacks. It was well known, back then, that the races had different average IQs. A few Blacks and Mexicans (usually the racially-mixed ones with the most White blood) were able to complete college and get professional class jobs, and some of them were successful despite the liberal propaganda that "segregation was evil" and that it denied minorities any opportunities. Minorities living in America during the time of segregation formed the most prosperous Black and Mexican communities in the world.
All this, however, changed with the appearance of Jewish activists (with Communist sympathies) in the 1950s, who, posing as liberals, turned the minorities from a relatively peaceful, unskilled labor force into a bitter, angry voting block. Many Blacks and Mexicans have become hugely parasitic on White society preferring to leach off (mostly White) taxpayers, collecting welfare and food stamps, rather than work anymore in unskilled jobs. As a result, our political and business leaders have provided a "solution" which allows millions of new Third World immigrants to flood America every year to do the unskilled jobs, which the resident minorities now refuse to do.
America would have been better off if it never used minority laborers. Instead of Black slaves in the South, poor Irish people could have been imported in large numbers and paid the equivalent of minimum wage to pick cotton. One million Irish died needlessly in the Potato Famine during the nineteenth century while Blacks were well-fed in the South. Irish people, however, have assimilated into American society while Blacks are overall a thorn in America's side. Even today, there is no need to import millions of Mexicans and south Asians while millions of Whites from eastern Europe would happily come to America if our government let them. Communism has left much of eastern Europe in chaos, and many hard-working, intelligent Europeans would gladly come to America to fix cars and mow lawns if that was the price of immigrating. At least their children would become educated professional class workers, instead of bitter, angry welfare recipients.