I voted bigoted and homophobic, as these are the only ones that I believe are universally applicable. Ignorant, stupid, and unreasonable are certainly possibilities as well, but I wouldn't label all opponents of same-sex marriage that way. A person can be homophobic quite willfully, and act in very reasonable ways to achieve their agenda of denying equal rights to GLBT people. I wouldn't use unenlightened in any circumstance. I don't claim to be a perfectly enlightened person, and I don't expect other people to be either.
A lot of arguments can be made against same-sex marriage that don't seem homophobic or bigoted on their face, but they're riddled with logical fallacies.
We can't allow same-sex couples to get married because "marriage" is defined as being between a man and a woman - as if the definition of marriage is some universal physical law that never has and never can be changed.
We can't allow same-sex couples to get married because marriage has always been between men and women - as if history makes it right.
We can't allow same-sex couples to get married because same-sex couples can't have children - as if inability to reproduce is a legitimate basis for denying someone the right to marry, and as if natural reproduction is relevant in an age of adoption and reproductive technologies.
We can't allow same-sex couples to get married because it would be harmful to children - as if empirical evidence (
link) didn't overwhelmingly contradict this.
We can't allow same-sex couples to get married because its unnatural - as if "natural," which is conveniently not defined, has anything to do with the morality of human behavior.
We can't allow same-sex couples to get married because God condemns homosexuality - as if ones thoughts on god matter in a state that is separated from the church.
The reason these arguments don't make logical sense, is because
they aren't real arguments. They are merely fronts, so that people don't have to confront their own bigotry.
The real argument is:
The Institution of Marriage will be tainted if even dikes and fags can do it.
Its harsh and its ugly, and most people don't want to face their own homophobia, so they create other arguments as a distraction.
Trying to have a logical argument about the matter is almost pointless, as its not addressing the real issue. Peoples minds will never be changed about same-sex marriage, if they're hearts aren't changed first. Thats why people who personally know a GLBT person is much more likely to support GLBT rights. Its a lot harder to be bigoted against a person you know, than it is to be bigoted against an abstract concept.
In the meantime, people need to be held accountable for their bigotry. Faith can no longer be used as an excuse thats free from criticism. When a persons faith stops making sense, they change it.
Anyone who believes that God condemns homosexuality believes this because they
choose to believe it.