I'm sure there are a number of people on this board, both active and lurkers, who don't support gay marriage.
However, she makes a good point that the history will paint a very different picture of opponents to gay marriage. Currently, we can look at opponents of interracial marriage as bigots, racists, uneducated, backwards, super religious, etc. We'll probably look at opponents of gay marriage in the same light.
To answer Blue's question, yes I support gay marriage. I support the legal union of two people being referred to as marriage. I support a religious organization's right to not perform religious marriage ceremonies for gay couples. I'm lucky to belong to a religious movement that allows clergy to decide whether to conduct same sex marriage ceremonies. There is no universal prohibition or allowance of same sex religious marriage ceremonies in Reform Judaism. And yes, I do believe that this particular way of thinking and practice is superior to other religions that outright oppose same sex marriage. ***puts on flame retardant suit***