I laugh at the whole "The government shouldn't be involved in marriage" BS. Fine. Let's remove the government privileges granted by marriage and watch just how many gays and lesbians want to be wed (The answer? Not many). Of course they want the government involved: They just want it on their terms.
Anywho, marriage is not a
"right" nor is it an act of God. It's a social construct created by society for society and thusly regulated by society. Denying gays and lesbians the right to marry is no different than banning persons from marrying on account of age, number of partners wanting to be wed to, consanguinity or even species. And, before someone says it, gay marriage is not equatable to interracial marriage. Anti-miscegenation denied a specific group of men and woman (Blacks) a right afforded to another group of men and women (Whites). Neither gays nor lesbians are being denied any "rights", as no man nor woman currently is allowed to marry about man or woman, respectively. If a certain group of gays and lesbians were allowed to marry yet another group of gays and lesbians weren't, you might have a case. But they aren't. So you don't. You can't claim discrimination over a "right" no one has.
(Yup. I'm late to the party. Sue me.)