The economic concern has fueled bad feeling against immigrants in many times and places, and by extension probably bad feeling against the place from which they emigrated as well. At the risk of turning this into an actual music thread, there is a broad assortment of non-PC older, and tongue-in-cheek newer, songs which point this out.
Jan Christensen's song for the reopening of Ellis Island has a song, putting into words the feeling of earlier immigrants toward later ones, "They all look funny and they don't speak English and they're taking our jobs away..."
A somewhat older one is sung from the viewpoint of an Irish woman bemoaning that currently the Italian immigrants are taking the jobs because they will work for less, but things will be better "When McGinnis gets a job."
That gentle and tolerant Scots emigrant to Australia, where even more than in the U.S. the vast majority are immigrants of relatively recent time, Eric Bogle's tongue was probably bleeding from his fantasied Aussie lambasting of all unfamiliar newcomers in his ferocious, "I hate wogs, they live like dogs, some eat bananas and some eat frogs, some wear sandals and some wear clogs, it's all the bloody same to me 'cause I hate wogs."
There are plenty of these, of a variety of ages. In an earlier time when people did not travel as widely as often, distrust of the stranger was likely largely due to unfamiliarity of appearance and ways. More recently with increased worldwide mobility, the economic concern has probably played a larger role. Historically, newcomers, strangers in a strange land, have been willing to do jobs the local individuals may not be, or to do tough jobs for lower pay. The U.S. has had definite waves of immigration from different parts of the world in different times. I suspect that in difficult times, the brunt of bad feeling has been borne by whatever group happened to be the most recent large wave of immigrants.