They weren't treated very well by the middle and lower classes because they provided tough competition for jobs. They would work for very low wages so they took jobs away from the people who were working prior to their arrival.
In the early 1900s, Italian, Polish, and Jewish immigrants faced significant discrimination and hostility due to job competition and cultural differences. They were often accused of taking jobs from native workers and lived in poor conditions, leading to further resentment. Restrictive immigration laws were later enacted to limit their influx based on these prejudices.
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