There are at least two different arguments to face here. One, from the standpoint of Christianity, you're assuming they are also Christian, which we do not know. Two, from the standpoint of being an American, Christianity does not make the law. We live in a country where freedom of religion is a right. But none of us have the right to project our religion upon others.
Everyone will have an opinion, and that's fine, but understand the law is not formed around your opinion, or what the Bible says. Individuals have rights, and it is not for any of us to infringe on the rights of others.
And with that, I'm done. I've clearly expressed my views on a topic that has no place in this forum to begin with.