If gay marriage is a sin, then people who are gay and married to the same sex are flaunting their sin.
True, we all have sin in our lives, but most of us don't come into church openly denying it is sin. We work on confessing and letting God change us.
I don't think married gay couples should be allowed to minister, because that is condoning their sin. If they want to be celibate, and live for God despite same-sex attraction, that is totally different.
I just went to a conference on this very topic. Three same-sex attracted people spoke about how hard it is to follow Christ and be gay. But they all agreed that same sex marriage was not the way to go. One man God healed and he had been married to a woman for 25 years. But the stats show that only 30% of gay people are able to change their orientation.
We should love those people who cannot change, but encourage them to stay celibate and serve God.
We're all sinful, unalterably so, and the only way in which a person can be not sinful (as in, not sinning at all, ever, ever, ever) is to be dead. I mean, you obviously think sinful thoughts, you obviously sometimes, as do we all, act on those thoughts. And in some form or another, you'll be a sinful person until the day you're dead.
There'll be sins like homosexuality that you don't engage in, there'll be others like anger that you try to stop yourself indulging in, and there'll be others of some kind that you don't even bother to abate. What's the difference between you, or me, having thoughts of hatred arising (a sin in and of itself) and not removing that from our lives in its entirety, and a homosexual having sex with another member of the same sex and being quite happy not to bother removing that part of their lives?
By the bibles' own definition, we're all trapped in sin, daily. We can fight against it, of course, but never be fully rid of it in our temporal daily lives and I don't think any gay Christian can refuse to acknowledge that their actions are sin, and I don't think any other Christian can refuse to acknowledge that one or more of their actions, in some form or another, are sin.
So the pastor is really no better than the prostitute.
I often wonder, in this regard, why do we choose people whose sins are less repulsive (the pastor with a drinking problem at home) over others whose sins are no more sinful (the gay guy that gets daily abuse for being gay)?
Seems to me live and let live is a lot more fair than picking one sinful person to be socially superior to the other sinful person. Social elitism is really quite inhuman like that.