This is what we call Reality. Alternative visions, like that of the California court, are what you call Fantasy: matters of mere opinion.
True, the state of California can be and may one day be browbeaten politically or juridically into issuing marriage licenses to two men or two women. A clergyman or judge can in such cases be recruited to perform, in behalf of such couples, a ceremony officially called marriage. Which would be "marriage" only in the political or juridical sense, nothing more; certainly nothing conforming to the historic understandings that "gay marriage" promoters think it unnecessary to refute, likely because they can't.
We have the oddest debates in the 21st century -- debates our forebears couldn't have envisioned, persuaded as they were of truths either formulated and delivered by God through revelation or deducible from the order of things -- from natural law, as we still know it sometimes.
Fantasy is first the act of abjuring or circumventing God for being so stuffy and mean, then undertaking to act outside universally understood norms so as to advance personal pleasure or satisfaction, all the while wondering why anyone else should care.
A secularized, or secularizing, society, increasingly turned off by Bibles and those who quote them, is especially open to the terrifying temptation. Think ours isn't that kind? Turn on the television.