I don't know about the eskimos but if you think native american indians didn't kill for entertainment you are sadly mistaken.
Native americans tortured captives for sport long before europeans landed in the americas.
Native americans practiced human sacrifice, infanticide, rape, as well as leisurely and creative torture such as roasting people alive and stopping to wait for victims to recover consciousness before continuing. They didn't do it because they were angry or evil (in their context)-- they did it because they enjoyed doing it. It was entertaining. It was fun.
They were no better- nor any worse- than the Europeans. Europeans also had a long history of enjoying torture- watching bears being torn apart by dogs- watching humans being "drawn and quartered" or burned alive. The religious ones were especially creative towards heretics and homosexuals.
Some particular tribes were friendlier than other tribes and didn't practice torture or practiced it less. Here I venture into speculation and speculate that they were less common. There's ample evidence that most native american tribes were constantly at war with other native american tribes.
I'm not dissing them- I have choctaw and cherokee blood. I'm just relating reality.