A Department of Homeland Security manager in charge of buying weapons and ammunition for the government is, on the side, running an inflammatory website that throws around gay slurs and advocates the mass murder of "whites" and the "ethnic cleansing" of "Uncle Tom race traitors," according to the Southern Poverty Law Center.

Ayo Kimathi, who calls himself the “Irritated Genie,” told his supervisors that the website was set up to sell concert and lecture videos.

But the report showed the site's content strayed far beyond concert promotion, warning about a coming race war. His website, “War on the Horizon,” declares, “in order for Black people to survive the 21st century, we are going to have to kill a lot of whites – more than our Christian hearts can possibly count,” the Alabama-based SPLC said in its report.

One of Kimathi’s former supervisors at DHS told SPLC’s Hatewatch that, “Everybody is the office is afraid of him,” and that his co-workers are “afraid he will come in with a gun and someday go postal.”

The supervisor, who was not named, continued, “I am astounded he’s employed by the federal government, let alone Homeland Security.”

More On This...

Kimathi, who works for U.S. Immigration and Customs Enforcement, which is a division of DHS, reportedly got the go-ahead from the government to create and maintain his website.

That’s because as a law enforcement agency employee, he is required to get permission in writing if he engages in outside activities which includes everything from working a second job to volunteering.

The SPLC says Kimathi obtained official permission but did it by misrepresenting the true nature of his site.

“He told management that it was an entertainment website selling videos of concerts and lectures,” the report said. “He called it simply WOH, never saying that WOH stood for War on the Horizon.”

ICE spokeswoman Gillian Christensen said in a written statement that the agency “does not condone any type of hateful rhetoric or advocacy of violence of any kind against anyone.”

It is not known what disciplinary actions, if any, will be taken against Kimathi.

“Every ICE employee is held to the highest standard of professional and ethical conduct. Accusations of misconduct are investigated thoroughly and if substantiated, appropriate actions in taken," she said.

Kimathi's site even includes President Obama, who is technically his boss, on its own enemies list.

According to the WOH website, the organization was “created for the purpose of preparing black people worldwide for an unavoidable, inevitable clash with the white race. Whites around the world are absolutely determined to exterminate Afrikan people in all corners of the earth."

The mission statement also claims to prepare blacks intellectually, spiritually, psychologically and physically for “a global clash that will mean the end of white rule on this planet or the end of the black race as we know it.”

Calls to WOH for comment by FoxNews.com were not immediately returned.