Cultural Relativism In Inuit Culture

I believe the act of deliberately sacrificing another human being is morally wrong, but there are some cases where it is justifiable. I also believe that cultural relativism plays a role in this, and that some societies view sacrificing others as morally right and that culture needs to be taken into consideration.
An example of this is the killing of female babies in the Inuit culture. Female babies were killed due to a high death rate among men, who were hunters, which led to a surplus of females. This shortage of men, meant a shortage of food, in order to keep the majority of the culture alive, men were of priority because they were the providers of food. It is morally right in their society to kill due to these circumstances, but our