Whatever you mean by skilled, the labor they provide is in demand. That's why they're here.
There is a widely accepted and used defintion of an unskilled laborer, it's often used in academia. They aren't here because there is a demand for their skills, but the result of a broken immigration system. Take agriculture for example, less people are employed in that field than ever, and with advancement in technology, less people are needed more so. They come because they get benefits they wouldn't get back home, like getting welfare for their children,
Racism is a tired old canard. There are no policies in place where people are discriminated against because of their race. This isn't Malaysia where the Bumiputera (ethnic Malays) have advantages over non ethnic Malays written into their Constitution. They benefit from admission to university, owning land, lower interest rates on loan, they must must own certain percentage of all corporations there, etc. That's racism, you can't compare to certain individuals not liking each other because of race or national origin. No one group has a monopoly on racism either. There are groups in the country who only hire people of their own race or country of origin.
They don't embrace America because they want to own it, they don't accept it for what it is, but what they want it to be, all you have to do is listen to their rhetoric. As I said earlier, to compare immigration of today to immigration of 60-80 years ago is incredibly stupid. There were no anti discrimination laws then. There wasn't safety nets then like there is today. Immigration over the last 40 years, much of it illegal, has made the US a worse place to live. Poverty has increased, real wages are down, the standard of living is down, the school system is worse off. Immigration, again mostly illegal, isn't the only reason, but it's a factor. To take in 30 to 50 million people over the last 30 years, many who collect welfare, use up public resources while working under the table and not paying taxes. When they go to the hospital you think they pay their bills? The vast majority don't, those who pay taxes foot the bill.
