This is an issue no conservative skeptic need feel guilty about opposing.
No non-Christian should decry any Christians for believing homosexual behavior is immoral or acting on that belief (short of harming or publicly humiliating folks). The thing completely missing from the liberal side is respect for traditional beliefs.
They also view the government as this generous source of largesse and approval. I favor limited government, but I also want the government to do a few modest things to protect various well-known institutions. This includes a few modest perks to help along the traditional family structure, which is so vital. It is beyond absurd to extend these perks to gay couples.
At the same time, I have no problem with some legislation, that would make it easier for a gay person to name his companion as his next of kin for various purposes. That would be almost no cost to the taxpayer. Once you take away benefit and approval-related issues, what you are left with is the next of kin thing and divorce law.
As far as inheritance, a will can be made out to leave an estate to anyone. Michael Jackson could leave Neverland to his monkey.
But none of these things constitute a marriage, at least not in the fullest sense of that word. For that, a spiritual recognition is necessary. And I am free to withhold that recognition all the while honoring the legal arrangements between two homosexuals.