From USA Today, the newspaper in front of the door at every hotel in America, the mainstream view:

Religion's only real commodity, after all, is its moral authority. Lose that, and we lose our credibility. Lose credibility, and we might as well close up shop.

It's happened to Christianity before, most famously when we dug in our heels over Galileo's challenge to the biblical view that the Earth, rather than the sun, was at the center of our solar system. You know the story. Galileo was persecuted for what turned out to be incontrovertibly true. For many, especially in the scientific community, Christianity never recovered.

This time, Christianity is in danger of squandering its moral authority by continuing its pattern of discrimination against gays and lesbians in the face of mounting scientific evidence that sexual orientation has little or nothing to do with choice. To the contrary, whether sexual orientation arises as a result of the mother's hormones or the child's brain structure or DNA, it is almost certainly an accident of birth. The point is this: Without choice, there can be no moral culpability.

So, why are so many church leaders (not to mention Orthodox Jewish and Muslim leaders) persisting in their view that homosexuality is wrong despite a growing stream of scientific evidence that is likely to become a torrent in the coming years? The answer is found in Leviticus 18. "You shall not lie with a man as with a woman; it is an abomination."

As a former "the Bible says it, I believe it, that settles it" kind of guy, I am sympathetic with any Christian who accepts the Bible at face value. But here's the catch. Leviticus is filled with laws imposing the death penalty for everything from eating catfish to sassing your parents. If you accept one as the absolute, unequivocal word of God, you must accept them all.

For many of gay America's loudest critics, the results are unthinkable. First, no more football. At least not without gloves. Handling a pig skin is an abomination. Second, no more Saturday games even if you can get a new ball. Violating the Sabbath is a capital offense according to Leviticus. For the over-40 crowd, approaching the altar of God with a defect in your sight is taboo, but you'll have plenty of company because those menstruating or with disabilities are also barred.

The truth is that mainstream religion has moved beyond animal sacrifice, slavery and the host of primitive rituals described in Leviticus centuries ago. Selectively hanging onto these ancient proscriptions for gays and lesbians exclusively is unfair according to anybody's standard of ethics. We lawyers call it "selective enforcement," and in civil affairs it's illegal.

A better reading of Scripture starts with the book of Genesis and the grand pronouncement about the world God created and all those who dwelled in it. "And, the Lord saw that it was good." If God created us and if everything he created is good, how can a gay person be guilty of being anything more than what God created him or her to be?

The suffering that gay and lesbian people have endured at the hands of religion is incalculable, but they can look expectantly to the future for vindication. Scientific facts, after all, are a stubborn thing. Even our religious beliefs must finally yield to them as the church in its battle with Galileo ultimately realized. But for religion, the future might be ominous. Watching the growing conflict between medical science and religion over homosexuality is like watching a train wreck from a distance. You can see it coming for miles and sense the inevitable conclusion, but you're powerless to stop it. The more church leaders dig in their heels, the worse it's likely to be.

Oliver "Buzz" Thomas is a Baptist minister and author of an upcoming book, 10 Things Your Minister Wants to Tell You (But Can't Because He Needs the Job).

I have other problems with religion, starting with the proposition that there's a God, and going on to what that God, if She exists, permits on earth, including the massacre of millions who share the "wrong" religion, but there's no question the evils of religion can be mitigated. Thomas shows us one way.