US Missionary Killed by Sentinelese Tribe

I do not know if anyone else has read about this story, but it is about a US missionary that was recently slain by an isolated tribe located in a remote island in the Bay of Bengal.  Following is the story from CNN: https://www.cnn.com/2018/11/22/asia/north-sentinel-island-john-allen-chau-diary-intl/index.html

What does everything think?

Initially, it seems such a tragedy losing your life at such a young age (27).  He seems to have the correct idea, when (as quoted from his diary) he wrote: "Lord, is this island Satan's last stronghold where none have heard or even had the chance to hear your name?"

But is there a better or more constructive manner in which to go about doing things?  Regardless of the attempt, does his type of approach lead to any type of fruit?  Yes, the tribe seems obviously hostile, so is there a better way to build trust than walking into a dangerous situation unannounced?

Interested in reading everyone's thoughts...

Something hokey about this island.  After being inhabited for "Tens of thousands of years" there are only 15 people on it.

I heard about this island on a show on the Science Channel recently.  I think it was one of those where they show satellite images, pretend they do not know what they are looking at, get some experts to talk about what it could be, and then show they experts talking about what it actually is.  As for the death, he had to have know the risk he was facing.  Following God's leading isn't always safe.  I don't know how to go about reaching a tribe like this, but I would have to think that an outsider would be viewed as a threat in any circumstance.

As for the being inhabited for tens of thousands of years yet being sparsely populated, that could be explained in a lot of ways.  Some people likely leave the island to see what is in the outside world.  I imagine mortality rates would be fairly high without medical care and with things like cyclones (hurricanes in that region) and seismic activity threatening them.

I think that while his heart was in the right place, he didn't fully think things through.  If these people are truly isolated from the rest of the world and don't have immunizations to many typical disease, of course they're going to be openly hostile to any outsider coming to them.