That's the bad news. Take heart, though - any laws that result will be struck down. All rights not enumerated or limited in the Constitution are reserved to the people. There is nothing in the Constitution that gives anyone the right to pass legislation regarding marriage. That's the approach the movement should take - it's none of anyone's business, and the government shouldn't extend privileges or limit rights in that area because it isn't authorized to fuck with an unalienable right - in this case, the pursuit of happiness. Being able to define the parameters of one's own family is essential to freedom, to free association and to freedom of religion.
Neither the government nor the Constitution can alter our unlienable rights. They don't come from a piece of paper or a power structure - we're born with them. They are inherent, implied, assumed. Government has traditionally limited our arrangements because the people allowed it. All we have to do is say stop. We don't have to accede a right to the government just because someone somewhere wrote a law. The law is based on nothing - it has no constitutional basis and the right is reserved to us. We are limited by neither English Common Law nor Judeo-Christian rules.
The American people have let a lot of things slide for a lot of years - we've allowed the government too much power over our lives and our property. We need to shake the American legal system to its foundations and insist that we be allowed full freedom unfettered by straight jackets constructed of out-moded customs and mores that aren't relevant in the 21st Century. There's no power for the government to tax us, to define our relationships for us or place limits upon them.
It's time to get down under what it means to be an American, and refuse to settle for this mediocre assortment of restraints designed to keep us obedient and servile. Like the Age of Enlightenment that gave birth to this country, it's time for Americans to free our minds from the tyranny of tradition and our behaviour from the tyranny of the majority. Let the 21st Century be the dawn of real freedom, unlimited by ancient parables, passé traditions and false presumptions of power.
No one has to give LGBT community the right to marry - we have it, and how dare anyone suggest that we don't? The onus is not on us to prove we should have it - the burden is upon government to prove it has the right to limit it, and there is no such authority in the Constitution.