I got a hundred bucks that says he dodges and avoids questions :)
So if man defines morality, then slavery, which society deemed morally acceptable was ok?
I hope you see the absurdity of the position you hold when you try to give society the credit for setting morality...
You cannot argue that anything is intrinsically wrong or right, it is just a matter of crowd politics.
That then means that morality is merely the expression of the majorities desire.
Which creates a problem, when the majorities desire is harmful to the individual...