This is a continuation of a long debate over the constitutional amendment up for voting in Wisconsin written by Owen, one of the guys in charge of Boots And Sabers - some choice tidbits:
The current debate about the marriage amendment has nothing to do with whether or not gay marriage should be legally recognized. It is already illegal. The current debate is about who gets to make that decision. The marriage amendment ensures that the defining of marriage will continue to rest in the hands of the people through their representative bodies.
...The vast majority of people in America oppose legalizing gay marriage and their sentiments show through their duly elected representatives. For this reason, the folks who want gay marriage legalized began – and continue – a very deliberate campaign to get gay marriage legalized through the only non-representative branch of government – the judicial branch.
The strategy is very simple. Keep suing until they get their way. Keep building the case law through sympathetic judges. They know that they can lose a thousand times, but they only have to win once.
Gay marriage and Civil Unions identical to marriage have now been legalized in two states. In both cases, they were legalized by the state supreme court without permitting the people of those states to have a voice in defining marriage.
....If our society wishes to legalize gay marriage at some point, then so be it. But we must move forward thoughtfully through our established representative bodies. To allow the courts to short-circuit this process and sweep away the definition of marriage against the public will, is to invite broad societal unrest.