That's what the general discussion is about. But my post was in reply to yours which said that upbringing etc had nothing to do with how we determine morality. I think that's been put to bed.
Correct. Your standards are a reflection of who you are. Your upbringing and all those other factors we've been listing determine that. And look, this is pretty obvious. If you'd been born to Mr. and Mrs Chan in 17th century China, or the Omars in modern day Iran or the Nguyens in Vietnam in the 60's then your personal outlook will be a reflection of your parents, your times, your religion, your culture etc etc.
As I'm not arguing that it sounds like we're in agreement.
I'll have to point out again that murder, by the very definition of the word, is determined to be wrong. Someone can be killed in one society and if it's not illegal then it's not murder. If someone is killed in a society where it is illegal, then it's murder. The morality of the act is exactly the same. All that changes is the legal situation.
And again I need to point out that a universal agreement on a moral matter does not, in itself, make it absolute. If everyone in existence agreed that X was wrong, you can't say it is therefore an absolute position. Because if one single person changed their mind then it would become relative. And that's nonsensical.