What were the complaints of nativist about immigrants

nativism became a general term for opposition to immigration based on fears that immigrants will "distort or spoil" existing cultural values. In situations where immigrants greatly outnumber the original inhabitants, nativist movements seek to prevent cultural change.

Explanation:

People thought immigrants were spoiling or ruining the value of there country be being "diffrent" of value

this isn't a question and if you're going to list things be kind and use commas.