Earlier quoted context omitted.
> People's emotions toward acts is highly dependant on the reference system they live in. Yes, but let's be careful not to conflate felt nobility with actual good. Sacrificing humans to false gods is pretty awful, no matter the sentiment behind the acts.
Try to put yourself in their shoes, to the victim it was probably a high desire, his family was probably proud, they may believe he went into heaven and were relieved. If the whole system is strong in its belief and consistent you cannot "understand" their acts as good or bad.
It's true that people need empathy, though, partly so they can be wary despite their own good intentions and clean consciences.