Gay Marriage in the US

I guess I'm kind of odd for being a member of the so-called 'Christian Right.' But I don't get why anyone would want a Constitutional amendment defining marriage. Isn't that a moral issue? Should our government be making moral decisions? How can we trust our government to make moral decisions?

The Libertarian in me says that if two consenting adults of sound mind want to commit themselves to any sort of contract, let them. So long as they harm no-one else, it should not concern me. If two men (or women) want to commit themselves to each other and a lifetime of increased taxes (good ole marriage penalty still applies), who am I to want to stop them?

For your reading pleasure, I include the Preamble to the U.S. Constitution (notice that nothing regarding marriage or other sacraments is mentioned):

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.

I'm keeping comments moderated, so if you want to see yours, keep it clean. I would also like to remind you that random insults are far less likely to inspire a change to person's mindset than a well thought out response.