They mean, “I don’t agree with gay people doing gay stuff”.

Why? It’s either: “Because the God I worship said being gay is bad”. Or “I don’t, know, it’s just wrong and if you try to make me think further by asking more questions, I’m going to make up reasons to justify my conclusion instead of having a good faith conversation.”

It’s sad that logical reasoning and argument formation isn’t taught in schools much. This is why we see people endlessly land in bad faith conversations riddled with logical fallacies. It sucks so hard :(