While I disagree with using the term "marriage" to define a civil union between two partners of the same sex - I'm going to have to side with the Anti-democratic Democrats on here
Long before the OMG TEA PARTY REVULOTION! populist mania hit conservatism, there were some of us who reminded everyone who would listen that we are "a Republic, not a democracy" - meaning that the Constitution, morality, and human dignity should trump the whims of an electorate.
That being said, tyranny by the judiciary isn't any better than the tyrannny of the majority - but admittedly the former has a little bit better batting average over the past fifty years or so.
The best we can do is send our best and brightest to represent us in our respective legislative bodies and let them do their job, and not demand that they take a public opinion survey every five minutes about how they should vote.
Real Republicans disagree with your assessment.