Sure it does...it's objective morality that doesn't correspond to reality. People have opinions about what is moral and what's immoral. They act on these opinions...
The fact that they disagree on morality, yet all believe they're "correct" confers more with the idea that they're opinions (though deeply held opinions) and not facts.
You couldn't prove a moral fact, nor give any methodology for discovering moral facts...so what use is there in calling them facts? For all practical purposes, they look like opinions and function like opinions.