An elusive (but not totally isolated) tribe in Peru killed an outsider who was known to provide them help (bananas, pots and pans), and it's not clear why (prob

An elusive (but not totally isolated) tribe in Peru killed an outsider who was known to provide them help (bananas, pots and pans), and it's not clear why (probably he stopped providing help), this and a series of other violent episodes prompted a government team to set up nearby in hopes of interacting with them to try to prevent future violence. T here already exist laws preventing others from contacting them out of a fear of communicable disease. Christian evangelists still interact with them, hoping to convert them, and it's pretty difficult to stop. In the end, despite mutual communication, they couldn't find out why they were killing people, because once they start asking questions, the tribe packs up and leaves. Their interactions outside of the jungle seem to be primarily for resources and when they are not provided with those, they get upset and leave, and/or take the resources forcibly.