Flickr/lewishamdreamer John Shore and his wife Catherine had been attending the First Presbyterian Church of San Diego for six years when they were nominated to serve as deacons. But before they could be ordained, they were asked to sign a document agreeing that no person in a same-sex relationship should hold any position of authority within the church, which is one of the city’s oldest. It was 1990. The couple had never heard the pastor or any of his fellow church-goers talk about homosexuality. "At first I thought she was kidding," John says. "I said something to the effect of, 'Wouldn't it be funny if there really were a document like that?'" John and his wife refused to sign. A few days later, copies of an article the pastor had written calling acceptance of homosexuality a heresy were stacked at the church's entrances. "That's how we learned there was a whole world of Christians out there that doesn't condone homosexuality," he says. Since then, John has dedicated himself...