Correction: We originally reported, based on a Politico article, that conservative activist David Horowitz had been tapped as a delegate for Donald Trump in California. A spokeswoman for the David Horowitz Freedom Center, however, tells us that contrary to the Politico report, if the David Horowitz listed as a Trump delegate is the same as the one who runs the Center it’s “news to him.” Horowitz has, however, urged conservatives to unify behind Trump now that he is the nominee. We’ve updated the post to reflect this.

Conservative activist and author David Horowitz is urging conservatives to unite behind Donald Trump now that he is the GOP nominee, writing in Breitbart on Sunday that “conservatives who have declared war on the primary victor are displaying a myopia that could be deadly in November when Donald Trump will lead Republicans against a party that has divided the country, destroyed its borders, empowered its enemies, and put 93 million Americans into dependency on the state.”

Horowitz, although he states a couple of qualms about Trump’s candidacy, makes a natural ally for the GOP frontrunner. After all, Horowitz based much of his recent activism on the idea that white people in America are the victims of discrimination by blacks and other racial minorities, while Trump has benefited from the idea of “reverse racism” among his base.

Just last month, Horowitz, the publisher of FrontPage magazine, told a radio interviewer that President Obama is “racist” for failing to recognize that it was “white Christian males” who ended slavery.

“There’s no community that’s more racist in America than the black community,” he has said.

Horowitz has urged the Republican Party to embrace this message, a dream that seems to have come true with the rise of Trump. He said in February that Trump has “hit a note that is absolutely necessary” on race. “Republicans and conservatives lose the battle,” he said, “because they won’t take the bull by the horns, they won’t call the Democrats liars, they won’t say that they’re treasonous, which they are, they won’t say that they’re racist, which they are.”

“I mean, it’s just unbelievable to me when you see how racist the Democratic Party is,” he said. “Everything is about race and everything is an attack on white people and anybody who’s not black or Latino.”

Horowitz frequently claims that Obama “hates America” and discriminates against white people by showing a preference for people with “a darker shade of skin” and supporting anti-white “lynch mobs.” He has said that Obama “would never be president if he weren’t black” because “part of the racism of our society is if you’re black you can get away with murder.”

He has also speculated that Obama is secretly Muslim because he is “anti-American radical” and “wants the terrorists to win.”

Horowitz’s insults have not been confined just to Obama. For instance, there was that time he called House Minority Leader Nancy Pelosi a “Jew-hating bitch” on Twitter.

The Jew-hating bitch Pelosi calls Hamas “humanitarian” because the Qataris –Hamas’s chief funders say so. http://t.co/tmBenc6Xkq — David Horowitz (@horowitz39) July 30, 2014

Horowitz is also very active in anti-Muslim circles, helping to finance a number of anti-Muslim groupshostingannual retreats through his David Horowitz Freedom Center that bring together prominent anti-Muslim activists and conservative politicians. (Past guests have included Sen. Ted Cruz of Texas, who was until recently Trump’s main remaining rival for the GOP nomination.)

He enthusiastically contributed to the smear campaign against Hillary Clinton aide Huma Abedin, who some anti-Muslim activists claim infiltrated the government on behalf of the Muslim Brotherhood, claiming at one point that she was “given a special dispensation to marry a Jew so she can infiltrate our government.” Horowitz has even hinted that Abedin was responsible for the attack on American diplomats in Benghazi, Libya.

Horowitz is also on board with the conspiracy theory that anti-tax activist Grover Norquist is a Muslim Brotherhood agent in the Republican Party, claiming that Norquist is secretly a “practicing Muslim.”

In Trump, it seems that Horowitz may have finally found the trash-talking, insult-heaving, white-racial-grievance-promoting, anti-Muslim conspiracy theorist candidate of his dreams.

He as accused people protesting at Trump campaign events of using “fascist tactics” reminiscent of the rise of Nazism.

Back in July, Horowitz praised Trump for his anti-immigrant rhetoric, claiming that Obama’s immigration policies “import disease and kill Americans.”

“Wake up America,” he said. “There’s only one conservative who is even near to talking like this and that’s Trump and that’s why he’s way ahead.”