There is no objective Morality

[Ryantology]

Any suggestion of objectivity would, by necessity, be subjective, wouldn't it?

No.

After all, an objective statement of a thing's objective place in the world is, by definition, not subjective.

But we'd probably think that is was the ravings of a madman, and it probably wouldn't make any sense to us And then we'd go and say that the objective truth is total nonsense, because clearly we know best

No, I mean, specifically, the suggestion of objectivity. There are easy examples of objectively* true statements such as "Breathable air is necessary for humans to survive", but that can be demonstrated (or are theoretically demonstrable).

I wouldn't argue that demonstration, right now, today, is necessary to label something as true outside of subjectivity, but on a subject such as morality, how can any single combination of behaviors constitute an objectively 'moral' code? Doesn't someone have to make that call (even if that someone is God), and does that not destroy objectivity?

*or, as near as makes little difference