Carlson frequently criticizes immigration. Carlson has been accused by Erik Wemple of The Washington Post and by writers for Vox of demonizing immigrants, both those who immigrated to the U. S. legally and illegally. He has opposed demographic changes in the United States, writing that the demographic change seen in Hazleton, Pennsylvania, which saw Hispanics go from a small minority to a majority over a 15-year period, is "more change than human beings are designed to digest". In 2018, Carlson suggested that mass immigration makes the United States "dirtier", "poorer" and "more divided".  In response to criticism of this, he has said that "we're not intimidated" and "we plan to try to say what's true until the last day. And the truth is, unregulated mass immigration has badly hurt this country's natural landscape".  According to Heidi Beirich of the Southern Poverty Law Center, "Carlson probably has been the No. 1 commentator mainstreaming bedrock principles of white nationalism in [the US]," promoting the idea that white people are under attack by minorities and immigrants. Anti-Defamation League's Jessica Reaves has compared Carlson's defense of the nuclear family to white supremacist anti-immigrant rhetoric.