Apparently this tribe has been hostile to outsiders since Gilligan's Island was in prime time.
They even threatened to kill an anthropologist giving away free coconuts.
https://www.usatoday.com/story/news/wor ... 123942002/An anthropologist who visited the remote Indian island where police say a remote tribe killed an American missionary using a bow and arrow formed a kind of relationship with the isolated Sentinelese people between the 1960s and '90s.
T.N. Pandit, now in his 80s, was a part of gift-giving expeditions to the hunter-gatherer tribes of the Andaman Islands decades ago, when the trips were sanctioned by police.
After several trips nearing the island bringing gifts including coconuts, Pandit and the team were able to make close contact with the isolated people. He told The New York Times in a previous interview that
encounters weren't always friendly – describing how the tribespeople did show initial hostility, armed with bows and arrows.On a trip to the island in 1991, Pandit, who wrote about his experiences in a book, was able to make his first close contact with the Sentinelese after the tribespeople peacefully (and unusually) approached his group in the ocean, but he was never allowed on the island.
In fact, during one of his seemingly peaceful encounters, he was approached by a tribesperson with a knife who warned him to stay off shore while giving away coconuts.