These foreigners hailed from unfamiliar regions [...] They dressed differently, spoke unknown languages, held unfamiliar beliefs, and competed for U.S. jobs. To many long-time residents, these newcomers didn't seem like real Americans.
Makes one think, eh? The quote, which refers to late 19th-, early 20th-century immigrants, comes from Ann Bausum's excellent Unraveling Freedom: The Battle for Democracy on the Home Front during World War I (National Geographic, 2010). I nominated the book for a 2011 Children's and Young Adult Bloggers' Literary Award in the middle grade/young adult nonfiction category. Unraveling Freedom makes a good companion to The War to End All Wars: World War I (Clarion Books, 2010), written by Russell Freedman for children in the same age range (12+).