Nativist n. : An advocate of nativism.

Example:
What reasons helped generate the Nativist sentiment against the "new immigrants of the late nineteenth century?

Taxonomy
immigrants, immigration, Canada, American Nativism, movements, United States, nativists, Catholics, sentiment, Australia, Philadelphia Nativist Riots, German Americans, World War I, fears, German, Anti-immigration, English, Protestant.

Defination from the web:
Nativist movements included the Know Nothing or American Party of the 1850s, the Immigration Restriction League of the 1890s, the anti-Asian ... Nativist outbursts occurred in the Northeast from the 1830s to the 1850s, primarily in response to a surge of Irish Catholic immigration. ...