I think you are trying to ascribe to me a general principle of moral relativism, which I do not in fact subscribe to (nor do most anthropologists btw). Whereas I see it as uniquely important to understand here because culture has such a dominant role in creating differing definitions of "murder". There's just no pragmatic point, in such a crowded field of opinion, of insisting on moral absolutism. What does it be gain us to pretend that an obviously arbitrary marker is the ONLY logical/moral/acceptable guidepost? This is an arena where mature, honest and earnest conversation is needed. Would be, even if everyone agreed on the parameters. And you can't have that if you aren't prepared on some level to respect the autonomy and validity of all perspectives that are going to be brought to the table.