Fox News correspondent Geraldo Rivera wrote an apology for his early support of Roger Ailes when allegations of sexual harassment against the former Fox News CEO and Chairman first surfaced.

In a lengthy Facebook post on Thursday night, Rivera apologized for responding to former Fox News host Gretchen Carlson’s sexual harassment lawsuit with “extreme skepticism." Rivera said the actions of Ailes described in the lawsuit and in allegations by other women was not the man that he knew, and that Ailes was as “flirty as the grizzly” in the movie The Revenant. But if the allegations are true, Geraldo wrote that Ailes “is s a deceitful, selfish misogynist.”

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Just a few days before Ailes resigned in July, as Rivera pointed out in his Facebook post, he tweeted "Don’t believe the crap about #RogerAiles. Only ones talking dirt are those who hate#FoxNews & want to hurt network that's kicking their ass."

"Now I am filled with regret for stubbornly discounting their various allegations. The Murdoch’s would not have turned the world upside down but for good cause. Moreover, I apologize for my skepticism. Like victims of sexual assault, those alleging harassment deserve the presumption of credibility,” Rivera wrote.

Rivera also apologized to New York Magazine’s Gabriel Sherman, who was out in front on the allegations surrounding Ailes.

"Even Ailes’ personal Inspector Javert, Gabriel Sherman, the New York Magazine writer I have called a “nerd with a grudge” deserves my apology. He is on the right side of history. Might does not mean right. I was wrong, and am paying the price,” Rivera wrote.

That price includes a very a real financial hit. Rivera asserts that HarperCollins, the book division of the Murdoch-owned News Corp., dropped his in-the-works memoir because of his support of Ailes.

"I learned Tuesday September 6th that after being enthusiastically received, because of my uninformed support of Mr. Ailes, and the relatively flattering portrayal of him in an early manuscript of my war memoir, 'Geraldo of Arabia, From Tora Bora to Trump,' as a direct result, HarperCollins has chosen not to publish,” Rivera wrote.

A HarperCollins spokesperson did not immediately return a request for comment about Rivera’s book.

"To all the victims of sexual harassment, direct and indirect, I am sorry for what happened to you,” Rivera wrote. "As the father of three daughters, including one in the news business, I urge all who have been offended to reach out. Similarly, if you see harassment, say harassment, even if the alleged offender is an old friend."