Okay, I haven't read this entire thread, and I'm a little late to the game, but since this is a subject that I'm passionate about, I'll add my two cents and apologize for restating anything that has already been stated. This is all just my opinion.
First, and maybe most importantly as far as the duty of the government goes, is the separation of church and state. Since the U.S. is a melting pot with people of all religions, if separation of the two is not upheld, our government would be a whole lot of ridiculous and often contradictory laws. As an agnostic, I can agree that the Bible is a good guidebook of morals but I also understand that it was written and is interpreted by man. And we all know man has flaws.
If changes to the government concerning interracial marriage hadn't been made, I most likely wouldn't be here. Do I think that there is a difference between gay marriage and interracial marriage? Certainly there are evolutionary differences when it comes to reproduction. Same-sex tendencies may be 'unnatural' but that just further proves the point that homosexuality is not a choice. Who chooses to be discriminated against? Who chooses to have less rights than the rest of Americans? Unfortunately, society has chosen.
As far as Ms. Cali goes, I can't say that I wouldn't have stated my person opinion and said "YES GAYS SHOULD MARRY!!" and potentially segregated audience members. But like her, I would not be representing America as a whole, and thus, I would not make a good Miss America. SHE lost her title. Not Perez Hilton. For her and myself, speaking what we believe, however conflicting they are, is more important than winning a pageant I guess. I don't dislike her, but I think that she is extremely misguided. She should attempt to educate herself more before speaking publicly.
For my friends who are gay and straight, I want the best for them. I want them to have everything that I could have - whether it be the title of marriage or protection against discrimination under the law. Being bi-racial has given me a different perspective on religion and discrimination that I don't think most people have. Fortunately for the GLBT community and friends, people are coming around and you will have your rights soon I hope. I, personally, will not be marrying until gay marriage is legalized. I won't contribute to bigotry and discrimination against my roommate, some of my best friends, and the GLBT community in general.
It simply doesn't make sense why I'm worthy of some rights, but my friends aren't in a country that promotes equalities.