Playing devils advocate here…homosexuality IS different than these other scenarios (or someone being born with a physical/mental handicap) because all it would take is the Church “accepting” them and they could live freely. It is not something that HAS to bind them or ruin their lives, if only others wouldn’t label them as sinful. So the argument goes, anyway.
Thank you so much everyone for all these thoughtful replies, all of it really is very helpful.
First and foremost, it would take more than the Church “accepting” them to let them live freely. If this were the case, they could just go join another church that does approve of this behavior. There are plenty. If the Catholic Church is so wrong on this issue, how can it be Christ’s one true Church, His spotless bride?
One thing I would like to do is shift the burden of proof: we have Bible passages in Romans, Leviticus, etc. condemning homosexual acts. Where are the passages condoning it? St. Paul writes extensively on how a married man and woman are to give themselves to each other. He writes about how widows and widowers are to remain celibate if they can, but if it will lead them to sin, to remarry. Nowhere does he include how a man is to love a man in their “union”. It’s not in God’s plan for a union to have two heads or two hearts, and how can you deny your headship or heartship without denying the intrinsic dignity of your gender?
Furthermore, we have 5,000 years of human history which treats homosexual acts as either abominations or at least not preferrable (the Greeks still had wives even with their little bathhouse escapades). It is only recently that people have begun to seek acceptance of these acts as natural and good.
Homosexuality is a disorder. I do not define myself by my heterosexuality; it’s just an aspect of me. Most of my gay friends tend to build the rest of their personality stemming from their gayness. It’s disordered to focus that much on sex. When your sexual preference is naturally sterile, there is no emphasis on procreation whatsoever. This naturally limits the unitive emphasis, too, since the ability to create life with your partner adds a depth to your union that can’t be replicated with artificial insemination or adoption. Whereas a heterosexual couple who marries and finds out they can’t have children has (ideally) entered into the union with the intention of at some point creating life together, a homosexual couple enters into their “union” knowing there will never be a little life to permanently bind them together. Their sex is always going to be purely for pleasure. Also, heterosexual couples who adopt can give a child what God intended in his natural plan: a mother and a father. Homosexual couples do not give this to children. Both adoptions are technically unnatural, but one mirrors what God intended and the other does not.
Another thing to point out is that homosexual acts are often physically damaging to those practicing them. I have heard many a story of a trip to the emergency room because of a “romantic escapade” gone awry. Even if you practice carefully with only one partner, it is damaging to your rectum to engage in sodomy. Lesbians often do damage or give infections to each other with the objects they penetrate one another with. This says to me that the emphasis in the majority of homosexual acts is less on unitive love and more on disordered kink in the bedroom.
I am heartbroken when I think of the spiritual, physical, and emotional damage my homosexual friends do to themselves and their partners. I know how natural it is to want to tell people you love what they want to hear; that it’s okay for them to want to love who they want to love. However, we can deduce not only from the Church, but also from logical reasoning and biological facts that it is not good in any way to encourage homosexual relationships. The argument that what two consenting adults do doesn’t hurt anyone doesn’t work when you can point to terrifying statistics of std’s spreading and sphincters being permanently damaged. When you have a culture that tells HIV-positive people that using a condom will protect their partner instead of demanding that they stop having sex, we have let sex become a false God that we need to be actively and lovingly turning people, straight and gay away from.
I know this really doesn’t give the spiritual references that the OP was necessarily looking for, but i do think these intellectual appeals, lovingly delivered, can help you be more assured of God’s truth and hopefully tear some people away from the damaging lies of our age.