What gives you the impression that I might be offering my critiques lightly or arrogantly, as opposed to only after arriving at them through extensive, careful, and deliberate thought?
Humans engaged in tribalistic groupthink committing moral atrocities is a tale as old as time.
It is never wise to accept a majority or status quo position reflexively without thoroughly interrogating the ideas held within. A great deal of majority positions are morally reprehensible and ethically indefensible, and that has always been the case throughout human history.
Human sacrifices of the innocent were not a "different culture", they were barbaric murders that were always wrong. They were also normative in much of the world for much of human history.
The values espoused (but not always upheld) by western societies that many of us take for granted today are the exception to the rules throughout human history - rules that promoted needless bloodshed, widespread suffering, and persecution of the innocent.
It is not arrogant to assert that loss of innocent human life is reprehensible and the societies that normalize it should be condemned. To assert otherwise isn't simply innocuously defending pluralism, it's defending atrocities.
All life is inherently valuable and I will not apologize for asserting that, no matter how many billions of people disagree for tribalistic, persecutory reasons.