The correct answer is “competed with Americans for Jobs as unskilled laborers.”
A major cause of antagonism toward “new immigrants” that came to the United States after 1880 was the belief that they competed with Americans for Jobs as unskilled laborers.
White American people have never accepted immigration. The are many reasons for this. Nationalistic ideas, the rejection of mix their culture, and labor reasons. Americans have considered that less-skilled immigrants come to America to get jobs because they accept low salaries or less wage in doing a job. This was the case in 1880. Chinese, Irish, Italian migration took jobs that American people thought belonged to them. And this caused antagonism and serious differences among them.