Lee, many Christians make the distinction between elements of the Law, dividing it into the dietary law, the ceremonial law, and the moral law. The vision to Peter and Jesus's comments on what comes out of the body as opposed to what goes in supersede the dietary law, the self-sacrifice of Jesus fulfills and supersedes the ceremonial law, and Paul's comments on being free to follow Christ and love and not to sin validate the moral law.
There are two problems here: Nowhere in Scripture is that sort of trifold division overtly made, so that that conclusion may be drawn; and Paul's repeated statement is that we are free from the Law -- all the Law.
This must not be taken in an antinomian sense -- we are free to do whatever we like. We are free by virtue of the fulfillment of the Law in Him Whom we take as Savior and Lord, and are therefore under our own binding oaths (for which term, interestingly, the Latin word is "sacramentum") to do His Will.
If, then, it be presumed that He looks with disfavor on gay sex, that remains a valid stricture against those tempted to engage in it.
However, the presumption that He does look with disfavor on any gay sexual act under any circumstances is based on interpretive work on Paul's comments, the extent to which Leviticus remains important in the lives of Christians, and a few other exegetical procedures that can be questioned.
Personally, I see Paul condemning hedonism, whether straight, bi, or gay -- selfish gratification of sexual lust, in the same way as selfish gratification of the appetite for food is condemned. I think he no more conceived of a quasi-marital committed loving relationship between two men or women in love with and covenanting lifelong bonds with each other than he did of heart transplants. (I also see the Scriptures condemning violent forcible or coercive sex, whether straight or gay, and the vile industry of compulsive prostitution, including the pandering of boys, and of course idolatrous fertility rites.) Others regard what they see as the flat-out condemnation of any sex act between two men as the plain sense of Scripture.
But the bottom line to all of this is, what are we as Christians called to do as regards our gay brothers and sisters? And IMHO that is amply contained in Jesus's teachings on how to treat our fellow man, male or female, gay or straight, or any other dichotomy you care to name. Those who preach the condemnation of "sin" without a sense of the interior feelings and motives of the people whom they therefore condemn as sinners are evincing little of the love and compassion which Christ commands. I can only suppose that they conceive themselves to be without sin and therefore eligible to throw the first stone, or are not taking seriously Jesus's commands about the dangers of judging another.
