I do not understand the "moral argument" concept.

I do not understand the concept of a "moral argument" because morality is relative.  If I were in Afganistan, there could be a moral argument for Islamic law because morality is based upon culture and concepts.  What is "fair" seems to be relative as well.

I see world yelling "why cannot I have nice things?", but I would guess that "nice" changes.  I am sure that a can of beans would be nice to a North Korean.

I think that the only true moral, moral argument, is to not have morality that forces behavior on others.