One argument I have not seen presented against homosexuality, is one that invalidates the idea that homosexual love is even possible, which requires one first to define love, and since the idea of love as a common reference point is taken for granted, it is rarely or never done.

But if one is a Calvinist, and accepts the proposition that Man is born into sin, and is in a state of total depravity, then humanity is not capable of generating love of its own volition. God is the author of all love, and any love experienced by humanity is first created by God, and chosen humans are the conduit for this love. So since God has created love, it is only possible for love to be experienced in circumstances that He approves of, such as monogamous Christian marriage, and since the Bible, and therefore God, disapprove of homosexuality, the notion of 'homosexual love' is an oxymoron. It simply does not exist, and can never exist. So one could point to the high failure rate of gay relationships and say that this is the reason why, there was never any love between them in the first place.

Of course one could equally apply this argument to heterosexual Muslim, Hindu, and Buddhist marriage too, and say they are as equally devoid of love as gay relationships are. It is only politeness that prevents this argument from gaining currency I suspect.