Internal moral standards can comply with international conventions. But because moral precepts vary from culture to culture does not mean that different peoples do not hold some values in common. Few if any moral systems proscribe the act of killing absolutely under all circumstances. At different times, in different societies, war, capital punishment or abortion may or may not be morally permissible. Yet for every society, murder is always wrong.
All societies require retribution to be proportionate to the wrong done.
The doctrine of national security has been especially corrosive of human rights. It is used frequently by governments, charged with the responsibility to protect citizens, to assault them instead. Under military rule, the instrument of protection from without becomes the means of attack from within. Prisoners of conscience beg to disagree. It is important to them to know that they have not been forgotten.