Marc Faber, the Swiss investor based in Thailand, provoked a backlash from business television and investment management firms on Tuesday after comments in his latest newsletter suggested the United States had only prospered because it was settled by white people.

The investor and commentator, known as “Dr Doom” for bearish calls on stocks and the economy, was dismissed from the boards of Canadian fund manager Sprott spoxf , NovaGold Resources ng and Ivanhoe Mines ivpaf after his remarks.

Business television networks such as CNBC and Fox Business said they would remove Faber from booking lists for their shows.

In the October edition of his newsletter, “The Gloom, Boom & Doom Report,” in a section discussing capitalism versus socialism, Faber criticized the move to tear down monuments commemorating the U.S. Civil War military leaders of the Confederacy, and said:

“Thank God white people populated America, not the blacks. Otherwise, the US would look like Zimbabwe, which it might look like one day anyway, but at least America enjoyed 200 years in the economic and political sun under a white majority.”

“I am not a racist,” Faber continued, “but the reality – no matter how politically incorrect – needs to be spelled out as well.”

The comments in his newsletter were circulated on Twitter after subscribers scanned and posted it.

CNBC and Fox Business Network, the business news television channels where Faber has been an occasional guest commentator for years, said Tuesday that Faber was now off their booking lists for their shows.

A CNBC spokesperson said, “We do not intend to book him in the future” and a Fox spokesperson said, “Faber has not appeared on the network often, and will not be on in the future.”

In response to CNBC’s decision, Faber told Reuters in an email: “What else would you expect?”

“If stating some historical facts makes me a racist, then I suppose that I am a racist,” Faber said by email.

“Maybe I am wrong and the U.S. would be far more prosperous if the blacks had populated it but then please explain to me why you would think so.”

For more on racism, watch Fortune’s video:

Sprott, a Toronto-based alternative asset manager where Faber had served as a director since 2010, demanded his resignation and he complied, effective immediately.

“The recent comments by Dr. Faber are deeply disappointing and are completely contradictory with the views of Sprott and its employees,” Sprott Chief Executive Peter Grosskopf said in a statement. “We pride ourselves on being a diverse organization and comments of this sort will not be tolerated.”