Native Tribal People - The Sentinelese of the North Sentinel Island of the Adaman & Nicobar Islands in the Indian Ocean: The case against interference, even in the current situation of the death of a religious intruder (see news article in the comments section below).

Summary - the preservation of a disappearing people and culture of direct lineage to our ancient origins, who seem to be in harmony with each other and the environment, as paramount against any relatively petty (secondary) considerations of our day to day culture and prejudices.

Incident - John Allen Chau from a fundamentalist Christian group in the US decided to make a secret visit to the restricted island where endangered tribal people live. The government of India has wisely outlawed any contact with the islanders. But Mr Chau was from a very problematic religious group that has a policy of trying to contact the last remaining isolated tribal people around the world, even if it's against the law.
Chau eventually made his way to the island by the help of some fishermen from India. He tried to contact the Sentinelese on his own, but was killed as a result because of their intense fear of foreigners. This is a kind of strict policy by the islands who are sometimes not too unfriendly if visitors keep their distance and throw coconuts etc to them. This is not allowed anymore because it could introduce dangerous and foreign pathogens etc.
For more details, please read below, including the article and others you can find.

From what I read John Chau was given full warning by the Sentinelese people. They first fired warning shots, but he ignored these apparent pleas to stay away. At this point the Islanders were probably very frightened and essentially had no choice but to impale him in some way. He might have kept going towards them, according to one report (Indian fishermen), even when hit by a missile and then he would have received even more injuries, which were eventually fatal.
I think this was a necessary action under the circumstances and consequently it should not be considered as a murder inquiry. I really hope the charge is eventually lifted. Keep in mind that most people who know how to get to the island also know that it's not allowed to get too close to the island.

These remarkable people probably have a good oral history of what happened to them over the last two centuries. Their recent history has been quite troubled and it's understandable that they are on guard ('sentinel' by nature at least) and quite aggressive.
They've not always been this way according to anthropologists and seemed to be quite healthy and happy on the rare occasions when they were studied from a distance and even filmed.

One particular bad incident occurred with a Christian group in the late 19th century, whereby some of the Sentinelese were kidnapped. The natives became ill very rapidly, probably succumbing to viral infections and most of them died very soon after. The surviving natives were returned to the island. It's very fortunate that the Islanders as a whole survived afterwards, although much reduced in numbers; because the ones that were brought back must have had viruses on them.
My point here is that Christians like Chau, part of the determined All Nations Christian group, practice a kind of 'forced Christianity'. He knew he wouldn't get permission, so he illegally tried to please his vain and pernicious god. Vain because it wants everyone to pointlessly know of its existence and pernicious because if you don't then you'll burn without end -  according to what is said in the Bible or what is normally considered as a strict interpretation of the text.
This is a terrible idea to spread to anyone, let alone an innocent minded or uncomplicated people.

Chau also probably knew about the potentially disastrous harm he could have inflicted upon them via viruses that he would have been carrying, from the research that he did on these vulnerable people.
I think we all carry various viruses that could be potential cold or flu types. These are deadly to isolated people that were not exposed to the rest of the world's human population. You could transfer them from a handshake.

This why I consider many forms of religion as death cults - As long as they get converts then that is the most important thing for them.  Death is insignificant for them - "better to die a christian than live without it". This is why some religions can be so dangerous.
Even the very ideas of other religions that are not suitable for certain people can have adverse effects.
Of course the aspect of death is important to religion as a way of coping with loss and a difficult life. No doubt the Sentinelese have a way of doing this in their culture and as far as we know it's been more than adequate for them.

Chau's Christian ideas would have been useless and confusing for the island natives and would be the beginning of the end of their culture even if you take disease out of the picture.
And his actions were not necessarily selfless. For a start he was insane as far as i'm concerned and if he would have put other people in danger in the West he might have been sectioned.
But his actions served his god and was meant to provide a place for himself in that strange imaginary world, and would have put him in high standing in his christian community. More importantly, he probably thought to some extent that his god was on his side as he approached the natives, possibly protecting him from harm. Doing what one thinks as good is no guarantee of safety and one part of him knew this.

It was good that he told his family not to punish the natives for trying to protect themselves though. At least that much credit should be given to him. Although some fundamentalists think this sort of thing is a necessary duty, it's a crazy thing to do on so many levels from my point of view and I'm glad many people agree on this point.
I also would like to thank Chau's family for not pursuing charges against the Islanders.

I can understand that some Christians would be offended by what some have described as rude sexual behaviour that could also be described as a kind of bonobo* type behaviour to a degree. But the same could be said about what Eskimos do/did in their igloos by sharing partners. *Bonobo as in 'behaviour', not in any sense an evolutionary level, nor any physical similarity.
This kind of morality, that doesn't cause harm, is 'relative' to a particular culture and situation. Some tribal cultures in other parts of the world were quite utilitarian and would seem quite harsh from our perspective. But from a survival aspect in harsh conditions, where conflict with other peoples is the case, apparently extreme behaviour is often a coping strategy; one that has kept these people going for many thousands of years.

With tribes that have already had contact with typically modern day people, some outside ideas might be helpful. One would be tempted, for example, to try and get rid of the ancient African practice of female circumcision (?). It's mostly African in origin I think. There were some examples of fgm in the American South with white Christians in the 20th century (evidence is available upon request).
The other point I want to make here is that the Sentinelese have made good use of some metal machetes that they acquired somehow. I think this is the case, although bone and shell ones were/are probably used.

I also think it's relevant to say that I was a Christian in my teens and it would not be difficult to see that these people are already in a kind of paradise like Adam & Eve were in the biblical allegory. Even then I thought that this allegory was harkening back to a previous history of 'hunters and gatherers' - a kind of life of innocence compared to the 'evils' of the so called civilised world.
Some of the Jesus philosophy, possibly influenced by lands further east, is better suited to people who need it in the many challenging circumstances of civilisation. But it's not critical if some of them never hear of it, at least not in any specific or religious context.

Another important point is that it's a sad thing really for the Sentinelese that they have to resort to violence and in this specific case it led to the death of an outsider. This, as was already pointed out, was not their fault; and has now put them in potential jeopardy with the outside world. This will no doubt make the Islanders feel even more uneasy now and they will probably live in yet more fear. This and the apparent fact that they would have preferred not to harm anyone is an unfortunate thing.
They will now have to live with the knowledge that they have killed an outsider, something they probably never wanted to do and one that will have upset their otherwise peaceful existence. Judging from the extensively long period they were on the island (tens of thousands, probably about 30,000 years), this seems a fair assumption.

I'm very glad that the Indian government has so far dealt with this issue carefully, and it's a mark of great understanding and intelligence that these people have been protected by law.
These cultures are precious and fascinating examples of how we lived and how we can still live in harmony with nature. A simple way of life should be appreciated, I think. They could also be a rare example of our ancient ancestors and strong evidence that we are all the same really and that we have a common origin.