Didn't God ask Abraham to sacrifice his son?
Yes but stopped him from doing it before it happened.
Look, I'm not arguing about every interpretation of Christianity or which is right or wrong. But our legal and moral systems have their roots in the Abrahamic religions and it's impossible to argue with that. I don't think anybody with any serious historical knowledge would argue with that.
I'm sorry I don't follow with that Aztec, Celt thing?
Some people are taking for granted on this thread that all belief systems share the same basic values as our own. Such as valuing other people and treating them well. This isn't the case. There have been other belief systems where people were only the value they could be to your God on your behalf. So you would kill or enslave them or dispose of them or exchange things with them and it was acceptable to do whatever your physical power could force other people to do because you getting power and acquiring things showed that your God was better than theirs and loved you most.
There is an assumption that our value system of not doing harm to others has always been universal. It's not. It originated in and spread (almost entirely) with the Abrahamic religions (although some other religions shared elements).
Morality is a subjective, evolved social construct that is innate within us due to our culture and an element of biology.
Er, yes, exactly my point. Most of the world has a value system based on the society and culture it developed in, And for most of the world those are societies and cultures which have their roots in Abrahamic religions. You can't say something results from 'society and culture' whilst ignoring that those societies themselves and their values evolved from those religions. Basically what you're doing is selectively cutting off concepts from historically provable origins.