BIRMINGHAM, Alabama – In recent days, a billboard has appeared on Interstate 20 near Birmingham with an interesting phrase on it: "Anti-racist is a code for anti-white".

The billboard faces westbound I-20 drivers as they head into Birmingham, before I-20 intersects with I-459. It contains no further information – no branding on the billboard itself, or the name of an organization. It is not yet clear who owns the billboard or who put it up.

But the phrase is not new.

In Harrison, Arkansas, a billboard with the same message appeared in October 2013. In the same month, a banner with that phrase appeared on an overpass in Eugene, Oregon.

According to research by the Southern Poverty Law Center's "Intelligence Report," the phrase is part of a 221-word screed by a segregationist named Robert Whitaker. Whitaker calls the text "The Mantra," and it has been repeated all over the internet by white supremacists and separatists.

The Mantra, which SPLC says first appeared in 2006, seems to indicate a fear of interracial marriage combined with a feeling that those who argue in favor of diversity only argue for diversity in predominantly-white countries (and not in say, Japan).

"The Netherlands and Belgium are just as crowded as Japan or Taiwan, but nobody says Japan or Taiwan will solve this RACE problem by bringing in millions of third worlders and quote assimilating unquote with them," the Mantra reads in part.

...

"But if I tell that obvious truth about the ongoing program of genocide against my race, the white race, Liberals and respectable conservatives agree that I am a naziwhowantstokillsixmillionjews."

"They say they are anti-racist. What they are is anti-white."

"Anti-racist is a code word for anti-white."

According to the Southern Poverty Law Center, the phrase and the Mantra have been spread on the Internet by activists who call themselves "the swarm. Another man – who calls himself Horus the Avenger but who the SPLC identified as a Timothy Gallaher Murdock of Dearborn Heights, Mich. – has spread the Mantra and his fear of a "white genocide" through a site called White Rabbit Radio.

Videos like the one below expand on the Mantra: