Fox News has traditionally treated bigotry as a core part of its business model. But since the political rise of President Donald Trump, the network’s commentators have adopted talking points that had previously been the province of hardcore white supremacists. The reported manifesto of the gunman who murdered 22 people at a Walmart in El Paso, TX, on Saturday is all but indistinguishable from transcripts ripped from its prime-time shows. This shift is not an accident but a programming decision, one the network has pursued even as its hosts’ racist rhetoric has triggered costly ad boycotts.

Rupert Murdoch and his son Lachlan Murdoch are ultimately responsible for this toxic programming. Rupert, chairman of parent company Fox Corp., laid the foundation for the shift. He then ceded much of the day-to-day authority to Lachlan, who maintained that heading as the Fox Corp.’s executive chairman and CEO.

Fox is feeding its audience a poisonous stew of bigoted, xenophobic conspiracy theories because that is what the Murdochs want the network to do.

A New York Times Magazine investigation found that in recent years, the Murdochs’ media empire has been “instrumental in amplifying the nativist revolt that was reshaping governments not just in the United States but also across the planet,” with their outlets fueling xenophobia and ethnonationalism to achieve political aims in the U.S., the United Kingdom, and Australia.

In the United States, that meant taking advantage of a rare opportunity to reshape Fox News following the removal of network co-founder Roger Ailes and the swift departures of longtime network hosts Bill O’Reilly, Greta Van Susteren, and Megyn Kelly.

Stepping in as acting CEO to replace Ailes, Rupert responded to the vacancies by giving Tucker Carlson and Laura Ingraham their own prime-time shows.

Carlson, a Rupert favorite, had already amassed a staunch following among white nationalists for his denunciations of diversity and fervent airing of white grievances.