The other interesting thing was that the most consistent disapproval came from the older crowd. This is consistent with statistically valid polls, which show the country is pretty divided on same-sex issues according to age. If you're younger than 35ish, then you are most likely fine with it (you grew up with Will and Grace, likely had some out gay friends in high school or college, etc.) This age effect dominates other factors like political, geographic or religious affiliations.
Our young mayor here in SF, Gavin Newsom (who just turned 40), knows how to interpret the same statistics, which is why his authorization of gay marriages as one of his first acts as mayor was nearly risk-free. When he gets old enuf to run for Senate, then Governor, then President, all those old folks who got all freaked over gays and lesbians will either be dead or too old to vote. The remainder will view him as a pioneer. There will always be the minority who thinks he's Satan himself, but they won't be enough to alter the electoral demographics.
Like most societal changes, these things are measured in generations (25 year ticks of the clock). You form a notion of what is "normal" before you're 18/20, and for most people, unfortunately it's tough to change it (or anything else about you) after that.