I think this is an example of cultural relativism. Cultural relativist recognizes that there are different moral values and standards in different cultural groups. In this example, the Inuit tribes kill babies due to the scarcity of the resources is a cultural and geographical feature that is not applicable to other cultural groups, thus can be used as supportive evidence for the formation of different moral standards, in this case, the action of killing babies is justifiable. David also mentions the other moral perspective developed with other cultural backgrounds and thus the recognition of the conflicting standards of moral value. David is not dismissively pointing out which of the two moral values are correct, instead, he simply states that the judgment of morally right or wrong shouldn’t be dependent on certain moral values developed in a certain culture.