By gay I mean a person who is same sex attracted. There are Christians who consider same sex attraction to be an inescapable fact about themselves, and not a sin in itself. However, in obedience to Christ, they maintain that they are obligated as a matter of obedience to Christ to live celibate lives.
It is possible to hold that homosexual acts are sinful, and something to be ashamed of, but homosexual orientation is not.
I am very sympathetic to the orientation/act distinction. One of the things that has fueled the gay rights movement has been the perceived failure of Exodus International. Biblical injunctions seem exclusively directed toward homosexual acts, not homosexual orientation. But charges of prejudice make sense only if what one is accused of prejudice against is something about which one has no choice. We can choose our actions, even if we can't choose our orientation.
See Wesley Hill's discussion here.