Once “The Passion” could be seen by ticket buyers  who would reward it with a $370 million domestic take (behind only “Shrek 2” and “Spider-Man 2” that year)  the truth could no longer be spun by Gibson’s claque. The movie was nakedly anti-Semitic, to the extreme that the Temple priests were all hook-nosed Shylocks and Fagins with rotten teeth. It was also ludicrously violent  a homoerotic “exercise in lurid sadomasochism,” as Christopher Hitchens described it then, for audiences who “like seeing handsome young men stripped and flayed alive over a long period of time.” Nonetheless, many of the same American pastors who routinely inveighed against show-business indecency granted special dispensation to their young congregants to attend this R-rated fleshfest.

Image Credit... Barry Blitt

It seems preposterous in retrospect that a film as bigoted and noxious as “The Passion” had so many reverent defenders in high places in 2004. Once Gibson, or at least the subconscious Gibson, baldly advertised his anti-Semitism with his obscene tirade during a 2006 D.U.I. incident in Malibu, his old defenders had no choice but to peel off. Today you never hear conservatives mention their embrace of “The Passion” back then  if they mention Gibson at all. (Fox News has barely covered the new tapes.) But it isn’t just Gibson who has been discredited. Even as he self-immolated, so did many of the moral paragons who had rallied around him as a culture-war martyr.

Take, for instance, the president of the National Association of Evangelicals. During the “Passion” wars, he had tried to blackmail Gibson’s critics by publicly noting that Christians are “a major source of support for Israel” and that Jewish leaders would be “shortsighted” to “risk alienating two billion Christians over a movie.” That evangelical leader was Ted Haggard, the Colorado megachurch pastor since brought down by a male prostitute. Gibson’s only outspoken rabbinical defender in 2004, the far-right Daniel Lapin, would be sullied in the scandals surrounding the subsequently jailed Washington lobbyist Jack Abramoff. William Donohue of the Catholic League  who defended Gibson in 2004 by saying, “Hollywood is controlled by secular Jews who hate Christianity in general and Catholicism in particular”  has been reduced these days to the marginal role of attacking The Times for reporting on priestly child abuse.

The cultural wave that crested with “The Passion” was far bigger than Gibson. He was simply a symptom and beneficiary of a moment when the old religious right and its political and media shills were riding high. In 2010, the American ayatollahs’ ranks have been depleted by death (Falwell), retirement (James Dobson) and rent boys (too many to name). What remains of that old guard is stigmatized by its identification with poisonous crusades, from the potentially lethal antihomosexuality laws in Uganda to the rehabilitation campaign for the “born-again” serial killer David Berkowitz (“Son of Sam”) in America.

Conservative America’s new signature movement, the Tea Party, has its own extremes, but it shuns culture-war battles. It even remained mum when a federal judge in Massachusetts struck down the anti-same-sex marriage Defense of Marriage Act this month. As the conservative commentator Kyle Smith recently wrote in The New York Post, the “demise of Reagan-era groups like the Christian Coalition and the Moral Majority is just as important” as the rise of the Tea Party. “The morality armies have failed to inspire their children to join the crusade,” he concluded, and not unhappily. The right, too, is subject to generational turnover.

As utter coincidence would have it, the revelation of the latest Gibson tapes was followed last week by the news that a federal appeals court, in a 3-0 ruling, had thrown out the indecency rules imposed by the F.C.C. after Janet Jackson’s 2004 “wardrobe malfunction.” The death throes of Mel Gibson’s career feel less like another Hollywood scandal than the last gasps of an American era.