I have some thoughts of my own on this (Which I don't really have time to get into right now-- production meeting starts in a few minutes) but I wanted to link to this:
For me, the true moral majesty of Christianity—the reason it has so thrived as a philosophy for two thousand years, and the reason I personally respect it so much—is the radical notion that we are all sinners. It's a marvelous machine for enforcing human empathy—unless, of course, the notion is systematically distorted, as it is by so many contemporary "Christians," especially within the subset known as the "Christian right." Take gay rights. There are two reasons a Christian conservative would single out homosexuality as the preeminent sin, even thought it's obviously so harmless and such an infintesimal subset of Biblical morality.
The one is the reason we've lately become all too familiar with: that the conservative Christian in question feels same-sex longing, so that hating homosexuality because some weird Freudian defense mechanism.
The second reason is if anything more frightening, more morally bankrupt—and, in the true sense, the most anti-Christian. I speak of the conservative Christian who embraces homosexuality as the transcendent sin because he doesn't feel same-sex longing, and can't really imagine feeling same-sex longing. In that case, what better sin to despise above all others? It banishes the hard work of Christian empathy altogether.