If you are reading this thread then you notice that libertarians are all over the board, all silly, but just spewing out nonsense, with one thing in common, they share a fantasy of an America that has no legal definition of marriage, nor that it be limited to a man and woman, or to two people, or limited in any way, except for the guy who is calling for a Catholic theocracy.
As a practical matter, that may be difficult for some, but I'd prefer it to having the Government redefine marriage and impose its definition on the churches, which is where we are headed.
The matter has already been removed from the States, in that homosexuals in the armed services who "marry" and return to states which do not sanction such unions will still get spousal benefits, even though the State does not recognize homosexual marriage.
That imposition comes only from government, not from a church.
The government is not protecting "marriage" but imposing alien concepts on those who have more traditional morals.
We grew up, we (as our parents insisted) became responsible for our actions, and now the government seeks to invade every aspect of our lives, from when we mow the lawn to what light bulbs we use to how many gallons our toilet flushes, to what we (supposedly) have to accept in those we associate with--right down to that association in the workplace.
The one unifying concept I see here is that libertarians (and I agree with this) want less government.
The whole phrase "Big Government Conservative" is an oxymoron.
The battle is between statists and those who want small government, and that crosses other lines. Moral statists are just as dangerous as liberal ones, imho. Either will sift your trash for an excuse to divest you of your freedom.