I have to be honest: I don't necessarily care if same-sex marriages are made legal in the United States. Such is a relatively minor inconvenience, really... just some scrapes and bruises, little hurdles that I'll just have to work extra hard to overcome. I can handle it.
What is detrimental, however, is the attitude behind the desire to withhold such a legal validation of families headed by homosexual couples. It's the same attitude that causes most (if not all) of the wars and famines and poverty in the world, namely this attitude that constantly demands, "Who deserves what [according to God]?"
Christians, especially, should not be found guilty of holding this attitude as it is core Doctrine of Christ that we should not judge anyone. We have no authority to decide who is entitled to what in God's eyes... that's His job, not ours.
We need to stop worrying about what people deserve and start focusing on what people need. It is heartbreaking to see immense amounts of money being spent on protecting "birthrights" when there are people who cannot afford to eat, when there are people who cannot afford shelter, when there are people who cannot afford proper care, when there are people who are literally incapable of sustaining themselves...
I mean, really, I can handle not being seen as a legally valid family, but I can't handle seeing so much time, money, and energy being spent on attacking the legal/spiritual/etc. validity of my future family when there are people who could benefit from some extra time, money, and energy.
And, really, why would one want to try to attack or preemptively defend a believed threat when one can help people with actual needs?
After all, 'defend' all people may, let them amend the constitution to define marriage as a heterosexual union... that's not going to stop me from finding a male companion and raising children with him. It's not going to lower the divorce rate among heterosexual marriages. All it will do is create a hostile environment towards people who do not share the same religious beliefs as opponents of homosexuality.
Yet, if we can spend these resources currently being exhausted in vain to build houses for the homeless, just think of the impact such could make...