Morality is premised upon the status quo of a particular social or cultural group, in which a whole host of judgements and responses are bound up in it, in order to provide some order and relative understanding amongst the composite people in the group.
Morality is a human creation and therefore subjective. Different groups have different morality complexes with each hinging on a specific system of value. Each values a specific quality or achievement that molds the rest of the morality. They are all based on opinion and not fact, without validity.
There are intuitive universal moral imperatives that, when abandoned, lead to societal and individual harm. To kill robs a person of their life and it robs society of a human resource. Greed, rape, oppression, dishonesty, and violence are all universally immoral, regardless of cultural bias/view.