ABC NEWS -- Wendy and Tom Montgomery are devout Mormons from California who pounded on doors in 2008 to support the passage of Proposition 8, the state referendum that overturned the ruling that allowed same-sex couples to marry in California, and is now before the U.S. Supreme Court.
They did so not knowing that their now 14-year-old son, Jordan, was gay and would later contemplate suicide because of the church's steadfast belief that homosexuality is a sin that would cut him off from his family not only here on earth but in the afterlife.
"One of core tenets we believe in as Mormons is that the family is eternal in nature," Wendy Montgomery, 37, told ABCNews.com. "Our family units are really strong."
Raised in a conservative community in California, the mother of six children said she often heard things like "gay people are disgusting and immoral" and "AIDS is God's punishment for homosexuality."
"To be honest, before my son came out, I didn't know any other families who had gay kids," she said. "It's one of the things that's not talked about in my church, which makes it so much harder to deal with and know who to go to for help."
The Montgomery family's struggle to reconcile its faith with full acceptance of their son's sexual identity is at the heart of the video "Families Are Forever," which premieres at Frameline 37: the San Francisco International LGBT Film Festival this weekend.
The 20-minute piece is produced by the Family Acceptance Project at San Francisco State University, and is part of a planned series of short documentaries that depict the journey of ethnically and religiously diverse families to support their lesbian, gay, bisexual and transgender children.
LGBT youth are more likely to engage in at-risk behaviors, according to the Project, which provides discussion guides and materials for parents, educators and communities. These resources have been recognized as a "best practice" by the American Foundation for Suicide Prevention.
"We have identified 100 ways parents and caregivers can respond and show how that affects their risk for suicide or substance abuse or HIV, self-esteem and sense of the future," said Caitlin Ryan, director of the Project, which has been studying LGBT youth and their families for 12 years.
"What we found across religious groups in conflict with homosexuality is many parents feel like they have to choose between their child and their faith," she said. "We've seen a lot of LGBT kids out of their homes and on the streets. Research shows high levels of negative reactions to homosexuality and risk for suicidal behavior and a sense of hopelessness. Jordan's greatest fear is that he felt he would be thrown out."
Ryan said that LGBT-specific suicide rates are difficult to find but could be as high as 4 percent and perhaps even higher among Mormons. A 2008 study in the journal Pediatrics suggests that acceptance, and even neutrality, about a child's sexual orientation rather than rejection, can reduce those rates.
In the short video, Jordan, a dark-haired boy with guileless eyes, explains that before his parents found out he was gay, he had considered taking "lots pills. ..."
"I was mortified at the idea of being disowned by my parents," Jordan says in "Families Are Forever." "I was like, I do not want to be thrown out of my home. I definitely expected to be excommunicated and restricted from church. But I still wanted to be with the church, like, I'd grown up with it, it was my life … until now."
Until about age 13, Jordan had been the "happiest, most exuberant child," according to his mother, but then he began to withdraw from friends and family. Looking for answers, she found an entry in his journal describing his attraction to other boys, though he had never acted on those urges.
The discovery shook his mother to the core.
"I felt like what I saw his life would be – what I expected his life to be – as a Mormon boy was now gone," she says in the video. "I saw him preparing for a mission for our church – gone. I saw a temple wedding – gone. I saw him being a father – gone."
Suddenly their son's conflict and depression made sense to the Montgomerys. But the church's view on homosexuality confused her: "God views it as a sin," she says in "Families Are Forever." "But I looked at a boy who had never done anything wrong, a pure innocent child, no way sinning or choosing this."
After leaving the family for several days, Montgomery said she and her husband, after saying a prayer, sat closely on their bed, and asked Jordan directly "Are you struggling?"
"I could feel him start to tremble and he nodded," says Montgomery. "We sat that way for two hours, and I hugged him and said, 'Jordan, this changes nothing. … You are perfect in our eyes. ... We will figure this out.'"
With what for her was shocking news about her son, Montgomery said she became a "master researcher."
"There were times when I wasn't eating or sleeping," she said. "I needed to find answers to help him."
She first bought books from the Church of Jesus Christ of Latter-day Saints. She was told that her son's homosexuality was a "choice," a "popular thing to do," and a "phase" he would outgrow. "None of that applied to my son," she said.