Concerns that arose among some Jewish groups over his handling of the story of Jesus in "The Passion of the Christ" in 2004 were replaced by widespread condemnations two years later when Gibson was arrested on a drunk driving charge.
According to a police report, he asked the arresting officer if he was Jewish and said, "F***ing Jews. The Jews are responsible for all the wars in the world."
Eszterhas is a veteran of the industry, having penned such titles as "Basic Instinct" and "Showgirls."
In his letter, he wrote that he hoped Gibson viewed the Maccabees project "as a kind of penance/apologia" -- a claim Gibson denies in his response.
Eszterhas said that soon after he began working with Gibson on it, he became "increasingly worried that I'd made a grave mistake by hooking up with you."
In discussing Jewish people, Gibson regularly used the terms "Hebes," "oven-dodgers," and "Jew-boys," Eszterhas alleges.
"You said most 'gatekeepers' of American companies were 'Hebes' who 'controlled their bosses.'"
"You said the Holocaust was 'mostly a lot of horsesh*t,'" the letter says, adding that Gibson made various false accusations, including that the Torah refers to sacrificing Christian babies.
Gibson called Pope John Paul II "the anti-Christ" and "the devil," the screenwriter alleges.
"You kept raging about your ex-girlfriend, Oksana Grigorieva," mother of their young daughter Luci, the letter alleges, saying Gibson referred to her with sexist epithets.
"You acted out for me the scene where you hit her. But you said you'd 'just slapped her a little bit.'"
Eszterhas claims in the letter Gibson explicitly said, "'I'm going to kill her! I'm going to have her killed!'"
Addressing Gibson, he says in the letter, "You said you'd become friends with two FBI agents (or former FBI agents) and they were going to help you to kill her."
Eszterhas recounts times that he, his wife, and his 15-year-old son felt endangered in Gibson's presence.
The teen taped one of Gibson's outbursts on his iPod, Eszterhas says.
Gibson once told the 15-year-old that he wanted to perform a sex act on Grigorieva and "stab her to death while I'm doing it," Eszterhas alleges.
"How can you share a loop from the pornographic snuff film which obviously plays in your head ... with a child?" the letter asks.
The bitter battle between Gibson and Grigorieva reached a financial and custody settlement last year.
Gibson pleaded no contest to a charge of misdemeanor domestic battery.
Writer Releases Tape of Mel Gibson's Profanity-Laced Rant (Graphic Content)
Gibson has defended accusations that he made anti-semitic remarks during a DUI arrest in 2006.
VIDEO: Watch Eric Spillman's Report
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