Why Is Luis And Salvador Unethical

While going through this tragedy of being stuck in the snow, Charlie, Luis and Salvador have come to try and help the Donner Party out of the mountains. When the party gets snowed in, the cattle start to be killed for food and soon everyone runs out. This is where people start dying and other begin to talk about feeding off of the bodies. It is said that Luis and Salvador never participated in the act of cannibalism, but did that help or hurt them? When traveling in one of the parties that tried to get through the snow, Luis and Salvador along with Charlie, Bill Foster, and a couple other Donner Party members started running out of the food that they had prepared before leaving, and people started dying from the cold and lack of food and it came done to one question between the ones who were still alive; Do we bury the bodies or do we use them as food?
Luis and Salvador never participated in this which makes me wonder why and how they lasted so long. I think Luis and Salvador may have not participated because of a higher moral or respect for the people who had passed away or maybe it was a type of voodoo in their tribal traditions. Whatever it may have been, might be the reason they could not run from the danger of Bill Foster. If Luis and Salvador had eaten just a piece or two, I think they would have had the strength to get away from Bill Foster and gotten to the other side of the snow. This brings up another question of why did they not run away earlier? I think they felt a dedication to serving Charlie and helping him help others that were stuck. I also think they had a soft heart for all the women and children they saw trapped in the snow. And because of that, they stuck by the people who despised their kind and later were murdered because of