He was a Christian missionary who intentionally went to an island that was placed under strict NO ENTRY policy by international standards because they are famously known to be hostile towards all outsiders
"Famously known to be hostile towards all outsiders." That's a good phrase for an island inhabited by natives that kill everyone who's not of their tribe with no exceptions. Their subtle warnings include immediate firing of arrows at anyone or anything they spot near their island.
they haven't killed everyone, back in 1980, or 1990, gotta look it up, they were visited by scientists who were studying them, to prevent getting killed, they showed up naked. clothing is perceived as a uniform, and been taught to kill all men wearing uniforms.
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https://www.bbc.com/news/world-us-canada-46293221