Its stupid because its a textbook example of a false dilemma. LGBTs that try to get married in a Southern Baptist ceremony are just trolling.
Marriage exists simultaneously as religious and civil institution. Any two people can participate in a ceremony and call themselves "married" as a function of their right to religious expression, but its a piece of paper signed in a courthouse that affords them all of the protections and benefits of state marriage. To argue that their exists a "right" for gay couples to participate in a religious marriage ceremony is akin to saying that there exists a right to First Communion.
Because there have never been legal trolls before, trying to force Christian bakers to bake gay wedding cakes or Christian florists to provide flowers for gay weddings against their will. Those people have prevailed there, so far. Like I said, there also is a case where the tax exempt status of a Christian university was in jeopardy for failing to recognize interracial marriage or relationships. The court ruled against the university. And Hillary Clinton's spokeswoman refused to answer what you think is such an obvious, stupid question on Friday.
The piece of paper may be initially signed in a courthouse, but it is usually not binding until after the religious or civil ceremony, by the way.