Ignorance of good  vs. choosing evil over good?   Still, the Prottie was a zealous idiot.  There's no virtue in self-inflicted martyrdom.

I agree that he was foolish.

He sang Protty "praise" hymns at them. They probably thought they were war or victory songs, since they sound very emotional and the savages can't understand the lyrics.

Now a reserved, black cassock-wearing, holy priest with Gregorian chant might have had a better chance (even so, plenty of priests were martyred by savage tribes over the centuries).

May his soul and the souls of all the faithful departed rest in peace. Amen.

So who is Poche praying for. 
As Matthew would say: my bad! 
Correction: for whom is Poche praying?

So who is Poche praying for...
As Matthew would say: my bad!

Correction:   For whom is Poche praying?

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He has "...the faithful departed..." so that leaves out the Protestant.  
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Protestants, being outside the Church where there is no salvation, are not among faithful, whether or not departed.
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At Thanksgiving Dinner today, the host asked everyone to hold hands in a circle around the table, while he said some invocations.
    He's a prominent Novus Ordo community member, surely keeping up with the latest trends at their meetings.
    No mention of Our Lord Jesus Christ, the Blessed Trinity, grace, or blessing the food, just "thanks" which belongs AFTER the meal.
    Note:  You can't make the sign of the cross when you're holding hands in a circle around the table. Oh, with bowed heads, of course.
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Another Catholic man present spoke to me later about that.
    He described another scene, elsewhere, when Protestants looked askance at him when he made the sign of the cross.
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I told him, Protestants are going to be shocked when they approach the Pearly Gates only to find out that
    St. Peter only admits those who make the sign of the cross.
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Here's what I was thinking:

What if we found an island of actual nαzιs (a colony descended from nαzιs in WW2) and they still acted/believed like the nαzιs. They shoot everyone who tries to land on the island. Do we A) attack the island, or B) "respect their space" and leave them alone?

Most people aren't for invading/conquering this island of bloodthirsty savages who have no respect for life or International Law (respecting life of innocents, women/children, ambassadors under flag of truce, foolish over-zealous Protestant missionaries, etc.)

Does such an evil and warlike people have a right to exist, or should someone subdue and conquer them?

Regardless of the Catholic doctrine that applies to this situation, those in the world are being hypocrites by not attacking them. If the USA discovered a modern-day nαzι colony (who still believed and acted as WW2-era nαzιs) you know they'd invade and subdue it. They'd set up some kind of protectorate, etc. and they'd destroy the whole colony if that's what it took to subdue them.

Why are nαzιs evil enough to destroy, but not a "primitive" bloodthirsty uncivilized tribe? Is it because Rousseau taught us how innocent and good the "primitive savage" is?

What if these bloodthirsty savages said they wanted to kill all Jєωs, instead of "all outsiders"? Would people feel differently then?

I literally bet $50,000 (double or nothing) that they would.

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It seems the isolated islanders are thought to be uniquely preserved subjects for anthropological interest, and since the islands are possessions of India, being within their 200-mile national shoreline limit, the essentially pagan India doesn't see much difference between the savagery of the natives and the backward or even demonic false religions of Hinduism or Mohammedism. 
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Therefore, the country that owns the islands (India) isn't about to interfere with the islanders' internal affairs any more than India would like to have outsiders (Europeans, Americans or whatever) interfere with India's internal affairs. 
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Curiously, this situation reminds one of the world our missionaries had faced, such as St. Isaac Jogues and companions (St. Rene Goupil, St. Noel Chabanel, St. Jean de Brebeuf, St. Antony Daniel, St. John de Lalande, St. Charles Garnier, St. Gabriel Lalemant). They had to contend with vicious, even cannibalistic heathen, in their attempt to bring the truth of God to them, even though many of them didn't want any part of it. 
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From an anthropological point of view, an island full of nαzιs wouldn't be the same category of place, since the nαzιs had come from a knowledge of Christianity and had reverted to the barbarism of non-Christianity, so they would be apostates. 
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Field researchers have tried to study the social habits and societal structures of such enclaves of remote people, with all kinds of various objectives in mind. They bemoan the enormous loss of historical information and awareness that occurred when the White man wiped out indigenous tribes of American Indians all across North America. And they want to make sure the same loss doesn't occur in whatever is left of remote clusters of indigenous peoples today. There are said to be many various such isolated tribes in the jungles of the Amazon, mostly Brazil, people who have no awareness of modern technology or culture -- objectively speaking, Christianity in its true form, that is, Catholicism, and the profusion of knowledge that goes along with it, philosophical, technological and scientific.

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Well, it's too bad that this is how he met his end.

And a Catholic priest would suffer the same fate -- they're a viciously aggressive peoples with no outside contact. 

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An act of self defense.

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That's not a sentence.