What religious group among immigrants was opposed by the WASPs during the mid-19th century into the 20th century?

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Catholics were opposed by the WASPs during the mid-19th century into the 20th century. This was largely due to anti-Catholic sentiment and the belief that Catholic immigrants would not be able to assimilate into American society due to their religious beliefs. Anti-Catholic sentiment was also fueled by the fear of the influence of the Pope and the Catholic Church on American politics and society. WASPs (White Anglo-Saxon Protestants) were opposed to Catholics from any country as they viewed them as a threat to their dominant Protestant culture and values. This opposition was particularly strong during the mid-19th century into the 20th century, fueled by anti-immigrant sentiment and nativist movements.

What Religious Group Among Immigrants Was Opposed by the WASPs