All for Australia (1984)
“America was born as an immigrant nation. It went through many periods of nearly unlimited immigration, coupled with xenophobic backlashes when particular groups — Germans, Jews, Irish, Mexicans, or Poles — came in such numbers and so abruptly that the traditional powers of assimilation were for a time overwhelmed. But the eras of ethnic ghettoes and tribal separatism were usually brief, given the inclusive popular culture and official government efforts to overwhelm identification with the home country.”
2010s, Western Cultural Suicide (2013)
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Victor Davis Hanson 41
American military historian, essayist, university professor 1953Related quotes

We Will Not Be Terrorized (December 2015), Naturalization Ceremony speech (December 2015)

Contrasting Barack Obama with French President Nicolas Sarkozy
Barack Obama Has Little In Common With Europe http://www.humanevents.com/article.php?id=27669

As quoted in America: what my country means to me by 150 Americans from all walks of life http://books.google.com/?id=h4qpzo7yNxEC&pg=PA238&dq=tripoli+%22helen+thomas%22&q=tripoli%20%22helen%20thomas%22My (2002), Simon & Schuster, p. 238.
interview with In Search of Aztlán on August 8, 1999 http://www.insearchofaztlan.com/gutierrez.html

“Immigration without assimilation is an invasion.”
2015-08-06
Transcript: GOP Aug. 6 undercard debate
The Washington Post
https://www.washingtonpost.com/news/post-politics/wp/2015/08/06/transcript-gop-aug-6-undercard-debate/

On "The Troubles" in Ireland.
Judging Dev (2007)

This misattribution seems to have originated as improper quoting of an actually site-created preamble to an online page of Jefferson's quotes or paraphrases at the site Family Guardian https://famguardian.org/index.htm — self described as a "Nonprofit Christian religious ministry dedicated to protecting people and families from extortion, persecution, exploitation, socialism, divorce, crime, and sin." Among the preambles to their pages, these remarks summarizing the site creators' assessments on "Immigration Policy" https://famguardian.org/subjects/politics/thomasjefferson/jeff1280.htm for their page of Jefferson's statements regarding the subject, have occasionally been wrongly copied and distributed in various internet articles and comments as if they were direct "quotes" of Jefferson, sometimes with spurious citations to specific documents, most commonly the source of the first actual quote citation on that page: an 1806 letter to Albert Gallatin. It should also be noted that even the provided "quotes" at this site are not absolutely reliable, as on their index page for quotes of Thomas Jefferson on Politics & Government https://famguardian.org/subjects/politics/thomasjefferson/jeffcont.htm they indicate that some of the "quotes" they use are modernized and "generalized" (or in other words: paraphrased) in ways which diverge slightly from literal quotations of the original sources cited.
Misattributed