Your response has stunned me; I can't help wondering if you are serious. I have researched my family history to learn about myself, period. The relatives with whom I've shared my research find various individuals they're especially proud of (the one who fought in the Civil War is especially popular!). Two of my ggg-grandparents came here from Ireland during the potato famine, worked in a shoe factory and then on the railroad, and eventually homesteaded in Nebraska. To me that's a typical AMERICAN story.
America has been called a melting pot, and I'm proud to be the result of it. (I'm not happy about the displacement of the indigenous people in the process, but that's another topic). My ancestors came from England, Germany, Ireland, Denmark, and Norway. There were Catholics, Lutherans, Baptists, and more. They all intermarried and are part of my DNA.
Others have noted that some first-generation immigrants seem to share your feelings. I first became interested in my family history when I was 12 because my grandmother had come from Norway and I thought that was really cool. However, she refused to speak Norwegian or teach it to her kids. Many years later (and thanks to her oldest daughter and the Internet), I managed to make contact with relatives still in Norway and have a complete history of that branch.
The example of my Norwegian grandmother leads me to my answer to your question: "To each his own."