Sorry, I have to disagree. The bible condemns eating pork, eating various shellfish, beef with cheese, etc. So if there were propositions to eliminate the selling of cheeseburgers, lobster and pork products, would you have voted for that too? How about a law banning divorce or criminalizing extramarital sex?
People are free to believe what they want but putting into law those beliefs to be forced onto others is unAmerican. The language being used to condemn is the same language that was used about race. The bible said slavery was OK, so treating blacks as slaves / second-class citizens was OK.
Was there ever a point in your life that you actually decided you prefer women to men? Do you really think it's a choice? You're waiting for some genetic proof? What if someone proposed a genetic test to see if blacks were different than whites. Would you be OK with that? I wouldn't. It's time we all learn that if people pay their taxes and don't break any laws, we have no right to tell them how to live their personal lives.
That said I think the word "marriage" is loaded. I think the government should get out of the marriage business. The government should have civil unions for all and leave the word marriage to churches, etc. But I'm guessing people would still argue that since they believe homosexuality is wrong, they should be able to prevent gays from getting the same rights and privileges as straights. That's how we know they're bigots.