Sarah Rossi, the director of policy at the ACLU of Missouri, said the ACLU believes churches shouldn't be required to hold same-sex marriages, but she told the committee that that right is already guaranteed under the First Amendment.

"We don't think that clergy or churches should have to open their doors to lesbian and gay couples who want to get married," she told the committee. But "denying access to buildings, denying access to bakeries, denying access to catering services — all of this stuff goes too far."

Plus, Rossi said the measure could go a whole lot further.

Under Onder's resolution, schools, colleges, hospices, nursing homes, health care groups and other entities are considered religious organizations as long as their mission is in some way connected to a religion.

But one provision of the resolution says the state couldn't penalize religious organizations "act(ing) in accordance with a sincere religious belief concerning marriage between two persons of the same sex."

Because there is no mention of an actual marriage ceremony in that provision, Rossi said the state could codify being able to deny service to the LGBT community in general.

But Onder defended the proposal, saying that it relates only to weddings.