Anti-illegal immigration. Not anti-immigration in general.
I'm going to go with Anti-immigration. The group was founded by Otis Livingston Graham, who seems be anti-immigration.
"
Extract
This slender volume recounts efforts to limit immigration throughout American history. Otis L. Graham Jr. argues that the restrictions, from the Chinese Exclusion Act of 1882 to the quota laws of the 1920s, benefited the country, and he urges that the United States reduce immigration today. Despite the book's subtitle,
A History of America's Immigration Crisis, the book reads more like an article for a journal of opinion than a work of history; more than half of it is devoted to the contemporary drive to restrict immigration, which Graham favors because of the environmental, cultural, and economic problems immigrants allegedly cause.
Light on evidence, Graham's
Unguarded Gates makes many claims that are either wrong or insufficiently supported. “In the public debate” leading up to Chinese exclusion, he writes, “the arguments for continuing the laissez-faire policy on national immigration were remarkably puny” (p. 11). Support for immigration in the period was actually quite strong, and contrary to Graham's assertion that the “government had a responsibility to respond to overwhelming majority opinion” (p. 12), he provides scant evidence that such overwhelming opinion existed. Graham says he deplores discrimination, yet he applauds the discriminatory National Origins Act of 1924 that relied on the 1890 census—rather than the 1910 census—specifically to discriminate against eastern and southern Europeans. He justifies the refusal by the United States and other nations to admit Jewish refugees on the eve of World War II, arguing that “such a response would have encouraged Hitler and all ‘ethnic cleansing’ leaders in the future to expel undesirable populations” (p. 73). Better such people should perish than such a precedent be set."
https://academic.oup.com/jah/article-abstract/93/2/615/831604?redirectedFrom=fulltext
As well as John Tanton, who also seems to be involved in anti-immigration as well as white nationalism.
"More damaging, however, was the leak, shortly before a 1988 English Only referendum in Arizona, of the so-called WITAN memos written by Tanton and the then-executive director of FAIR, Roger Conner. (WITAN was short for the Old English term "witenangemot," meaning "council of wise men." The memos were meant for Tanton colleagues who met at retreats to discuss immigration.)
The memos were replete with derogatory references to Latinos, reflecting a kind of entrenched bigotry that had only been suspected before. They complained mightily of the high Hispanic birth rate suggesting that Latin American immigrants would bring political corruption to the United States.
The memos included a demographic punchline that depicted Hispanics as hyperactive breeders and revolted many readers: "[P]erhaps this is the first instance in which those with their pants up are going to get caught by those with their pants down."
https://www.splcenter.org/fighting-...nd-behind-organized-anti-immigration-movement
Polifacts also notes the history of the organization and the racist activity it gets up to.
"Heidi Beirich, director of SPLC’s Intelligence Project, summarized why CIS landed on the list in the
America’s Voice blog:
"CIS has a long history of bigotry, starting with its founder, white nationalist John Tanton, but in 2016, the group hit a new low. CIS commissioned Jason Richwine, a man who’s Ph.D. dissertation endorses the idea of IQ differences between the races, to write multiple reports and blog pieces for the organization. The group also continued to circulate racist and anti-Semitic authors to its supporters, and finally, staffer John Miano attended the white nationalist group VDARE’s Christmas party in December."
https://www.politifact.com/article/2017/mar/22/center-immigration-studies-hate-group-southern-pov/
As for Primes sources, from my quick search, I believe the first one did show some bias from the organization, but I don't think the other one turned up any results. For the record, I only did a quick search on both, but the organization you posted was very quickly red flagged.
