Actually, thinking about it, I’m not sure acceptance of a Homosexual lifestyle as “ok” is actually heresy. I personally would argue it’s wrong, (as I think the majority of Christians would) but I dont think it actually contravenes any of the creeds.
There is no doubt about the idea of accepting there are other ways to God than through Christ Jesus and Him alone. That quite definitely is heresy.
You are correct. It does not. Homosexual acts are sinful (Old and New Testaments) but this world is drenched in sin of all types. The creeds specify what Christians believe but do not address specific sins. That is not what they are for. If the creeds addressed specific sins they would be looooong!