It is opposed by the Catholic, Baptist, and Mormon churches. They argue that discrimination is such a fundamental part of their religion that they will be unable to practice their faith without it.
Most of us were taught as children to respect other people’s religions, but I reject wholeheartedly any belief system that marginalizes or hurts people.
What these people have done is build a false idol of their own prejudices and insecurities, and insist on worshiping it as if it came from God. It’s a sad combination of ridiculous and pitiful, and it should not be honored, respected, or protected.