
1910s, Address to the Knights of Columbus (1915)
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
1910s, Address to the Knights of Columbus (1915)
"How the West was lost" http://www.melaniephillips.com/how-the-west-was-lost (May 11, 2002)
We Will Not Be Terrorized (December 2015), Naturalization Ceremony speech (December 2015)
10 June 2014 from same speech, YouTube audio excerpt https://www.youtube.com/watch?v=vKnCCzAv3s4&t=34 via the DC Examiner
2010s, 2014
All for Australia (1984)
Quoted in "Knighthood for Venkatraman Ramakrishnan".
Collective Nouns, blog post http://www.arthurkemp.com/?p=140
Quotes from other works:
State of the Union address http://millercenter.org/president/clinton/speeches/speech-3440 (24 January 1995)
1990s
Context: All Americans, not only in the States most heavily affected but in every place in this country, are rightly disturbed by the large numbers of illegal aliens entering our country. The jobs they hold might otherwise be held by citizens or legal immigrants. The public service they use impose burdens on our taxpayers. That's why our administration has moved aggressively to secure our borders more by hiring a record number of new border guards, by deporting twice as many criminal aliens as ever before, by cracking down on illegal hiring, by barring welfare benefits to illegal aliens. In the budget I will present to you, we will try to do more to speed the deportation of illegal aliens who are arrested for crimes, to better identify illegal aliens in the workplace as recommended by the commission headed by former Congresswoman Barbara Jordan. We are a nation of immigrants. But we are also a nation of laws. It is wrong and ultimately self-defeating for a nation of immigrants to permit the kind of abuse of our immigration laws we have seen in recent years, and we must do more to stop it.
1920s, Whose Country Is This? (1921)
Context: From its very beginning our country has been enriched by a complete blend of varied strains in the same ethnic family. We are, in some sense, an immigrant nation, molded in the fires of a common experience. That common experience is our history. And it is that common experience we must hand down to our children, even as the fundamental principles of Americanism, based on righteousness, were handed down to us, in perpetuity, by the founders of our government.