In some respects, it is true......unless you are 100% "native...indigenous" you or your ancestors are immigrants and there will be those who say that the Native Indigenous are immigrants too, but they were the first ones here. It seems that so many people are hating on each current nationality coming, but they have no idea (or don't care) what their first generation family suffered through when they got here. It seems as though "Americans" (those who have been here for a generation or two) seem to have lost the work ethic of first generation immigrants and businesses take advantage, especially in manual labor. Everybody bitches about the South Americans coming in and taking jobs, but there are not many Americans the are willing to work those jobs....because there are brutal. Here in the Northeast we got beat up with the snow, the landscape workers were out clearing the snow on skid steer loaders and shovels for over 30 hours straight.....most likely for minimum wage...or less? They are cold, tired, but they kept working til it was clear.
It's well before my time, but I have seen the history when the Irish started immigrating here, there were hall wanted signs that said "Irish need not apply" we here in US are a rare environment of a very mixed nationality that has made this country what it is...special. We just need to learn to hate less.