An evangelical Christian worship singer who has been urging churches to change their doctrine on homosexual behavior since announcing she is a lesbian is at the forefront of a coming tidal wave of "infiltration" of the church by promoters of the "gay" agenda, contends evangelical attorney, evangelist and activist Scott Lively.

Lively, president of Abiding Truth Ministries, said that with insiders on the offensive such as Vicky Beeching, a British-born artist who has become popular among evangelicals in the U.S., he expects "attacks on Christians in America like we've never seen before."

He explained that after the Stonewall riots in 1969, homosexual activists banded together to oppose every American institution that did not fully accept and promote homosexual behavior.

The first victory was over the American Psychiatric Association, and within 40 years, every other group had been conquered, he said. The Boy Scouts were the latest to fall, just a year ago.

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Now, the only organization left is the church, he said.

"All of their battle-hardened activists and enormous resources are all directed at the church," he said.

The problem is that church leaders haven't been preparing for such a fight, Lively said, and don't really know what the movement is about.

Beeching revealed she is a lesbian in an interview last week with the Independent newspaper of London.

"What Jesus taught was a radical message of welcome and inclusion and love. I feel certain God loves me just the way I am, and I have a huge sense of calling to communicate that to young people," she said.

Lively, however, said Beeching represents "the drawing back of the tide before a tsunami" and an indicator of "how bad this is going to get."

He's published a brochure for pastors that explains what the Bible says about homosexuality.

"Not a single biblical passage portrays homosexuality positively," the brochure says. "Jesus unequivocally condemned ALL sexual sin including homosexuality by affirming the 'one flesh' paradigm of Genesis."

It contends a "dangerous modern heresy called 'gay theology' is infiltrating the Christian church at an alarming pace."

"Many believers, fearful of being called 'haters,' are trivializing the threat by calling homosexuality 'just another sin,'" it says.

"But from Genesis to Revelation, the Bible teaches that homosexuality is NOT 'just another sin.' It is a symbol of extreme rebellion against God and harbinger of His wrath."

Listed are multiple biblical condemnations of homosexual behavior.

He said his goal is to put the brochure into the hands of every pastor and Christian leader in America and around the world so they have a biblical explanation for why homosexual behavior is sinful.

Lively noted one of the founders of the "gay" agenda, Herbert Marcuse, expressed a desire to see the "disintegration of the ... monogamic and patriarchal family."

"One last barrier to 'gay' cultural hegemony remains: the Christian church," Lively said.

Watch Vicky Beeching go public with her lesbianism on Britain's Channel 4:

Lively is not unfamiliar with attacks on Christians. He's being sued by activists in Uganda who accused him under the Alien Tort Statute of inciting the persecution of homosexuals.

The case is significant because a ruling against him would mean that an international agenda based on anti-biblical standards could trump the U.S. Constitution's freedom of speech and religion.

U.S. District Judge Michael Posner has let the case brought against Lively by an African group called Sexual Minorities Uganda, or SMUG, proceed.

SMUG calls Lively's speech against homosexual behavior a "crime against humanity" in violation of "international law." The plaintiffs allege the Alien Tort Statute in the United States allows them to make the charge in a U.S. court.

But Lively's attorney, Horatio Mihet of Liberty Counsel, says his client's preaching is protected by the Constitution.

"We believe SMUG's claims are firmly foreclosed, not only by the First Amendment right to free speech, but also by the Supreme Court's recent decision in Kiobel, which eliminated Alien Tort Statute claims for events that allegedly occurred in foreign nations," he said.

Yet, Posner took nearly 80 pages to say that he thought SMUG's allegations were substantive and needed to be adjudicated.

Everything you think you know about Nazis and homosexuals is wrong. Read Scott Lively's controversial bestseller "The Pink Swastika."