This quote alone, if he really believes it, makes this person an ignoramous. You have to know what is moral, because anything less purposely violates one's sanctity. Everyone knows exactly what is moral, what is right, and what is just. There is no excuse.
If a person chooses to IGNOR what is moral or listen to the lie, it is no excuse for their misdeeds.
He completley contradicts himself just in those statements.
-Do unto others: everyone knows.
-What is moral: noone knows.
Do unto others is statement of morality. Dawkins is a sophist — if you peel away the artful argument you find nothing. Not even the Emperor’s new clothes.