So i will make my case for Objective morality. Many believe that morality in many cases is subjective. Well why would that not extend to even the most immoral and horrific acts such as rape , murder ect.? One cannot equate right vs wrong, nor have any accountability if morality is subjective. The fact no person wants many of these horrific acts to happen to them imdividually is an undeniable fact that morality is objective. If one merely chooses to have poor morals and act in a violent or aggressive manner, it is not somehow subjectively justifiable.
I would consider life objectively valuable for a few reason. As each individual is objectively a separate person owning ones own body, mind, life and since life is an attribute of the individual, ones own life would be ones ultimate value. Each individual is morally an end in themself, not a means to the ends of others. That means a person has no moral duty to sacrifice them self for the sake of others (as religion and social subjectivism claim) nor a moral right to sacrifice others for their own sake (as personal subjectivism [or hedonism] claims). On principle alone, self-sacrifice or sacrifice of others is not moral, because, on principle, human sacrifice as such is immoral.
The entire premise of the NAP deems initiation of aggression is objectively immoral. If that isnt screaming objective moral code, I am not sure what could. Many can justify acts to self, but that never changes the morality. One can have many reasons to choose to be immoral, that however doesnt change the fact it was still immoral.