I think the battle to take away same-sex rights isn't just about marriage. It's about the nature of "homosexuality" itself. People think it's wrong and they want the world to know it. They want the homosexuals to know it. And most importantly, they want to be the ones who are right.
Sexuality is natural. We were all born with sexuality. It is a human quality. It is one of the most sacred and beautiful things about human beings. Unfortunately, because of it's complexity, it has been misused, hated, feared and condemned throughout history. Heterosexual, homosexual and autosexual acts have been condemned. If you think about it, everyone has committed horrible crimes against nature if you take into account every religious or societal law.
So, because some people are innately attracted to members of the same sex or both sexes, it's natural. That's how were were born/made/created. Homosexuality is not a choice. You can't choose who you're attracted to. Yes you can choose what to do with your attractions, but you cannot choose what sex to be attracted to.
And for those of you who claim that homosexual sex is wrong because it isn't procreative, think of all of the non-procreative things that heterosexual couples do. (And yes, at times, the end of the digestive tract is involved in some heterosexual situations.)
And just in case anyone was wondering, I'm only attracted to men. Yes, it's possible for a "straight" person to support gay rights, believe it or not.