What's most interesting is that he fully knew the dangers that were going on. Indeed, he had been shot at with arrows and chased out before; he had had his canoe destroyed and swam back to the boat (apparently a very athletic fellow), yet he persisted.
He even had strategies for engaging them.
He apparently fantasized about going to the North Sentinelese for a long time, and had always had something of an obsession with the tribal, and likewise as extremely devoutly religious.... He was an EMS (Emergency Medical Services) worker, as well... And it seems to be a real adventurer and wanderer.
When he was shot full of arrows, he kept walking towards them, peacefully, I guess knowing that he would not be able to get away (his canoe had been gone at this point) and hoping that, somehow, this last gesture would have fixed the problem...
Certainly, all of this is incredibly romantic.
If we were to think about it in terms of logic and rationality... There was a very high chance it would end like this. He was also breaking laws... But his friends recount that he valued these specific people's salvation immensely, and that he talked about it like he would be fully ready to assimilate into their tribe if they would accept him. He didn't actually want to change their way of life beyond introduction of is religion -- of course, that is a big change, yet it also shows that he fully respected their mode of existence.
I guess I would conclude by saying that it was not the best move, and there are some elements to it that are also otherwise problematic... YET... It was exceedingly brave, and a sort of profound gesture.
If a man risked his entire life to come to tell me about Islam or Hinduism, no, I would not change my beliefs... and I would think there is something perhaps presumptive in his attitude that I need to be saved or that I need to change... Yet. I would fully respect that and would hope for him the very best.
And I think any society which would respond with overt violence towards someone that came with gifts and came raising their hands out to shake is in the wrong. Maybe there is a legitimate fear of invasion or erasure, but still, in this circumstance, that society is backwards and wrong, IMO.