Really? I see it all the time.

For example, last week: https://news.ycombinator.com/item?id=35024471

And two weeks ago: https://news.ycombinator.com/item?id=34947944

It actually seems like some people can't shut the fuck up about it in every thread even peripherally touching upon African history.

It is like you did not read the first sentence of the comment that you are replying to. I'll repeat it in another form: the gp implied that human sacrifice is sufficient enough to discard any other achievement of the society in question. I argue that the value of human life at the time was rather conditional matter. The rest of the debate is quantity and quality, and people who prefer to draw semi-arbitrary lines in the sand.