Winner
Diverse in Unity
I assume that you are speaking of the Aztecs, I do not think this native tribe to at the cultural level of the Aztecs, who going by history seems to be quite advanced. Therefore I think your argument that tribes at this cultural level are pretty violent and comparison with the Aztecs were quite misguided.
Aztecs were just a separate example of Latin American civilization, this tribe is clearly not civilized. I mentioned examples of behaviour of tribes on this level of development (stone age), namely New Guinea and Andaman islands, where they often behave very aggressively, territorially and savagely.
Strange. I think they have a more pressing right to survive than some right to be protected from other jungle people Winner speculates exist. I suppose we should bring them Jesus when we go save them, too, huh?
Actually, they don't

It applies to people who know that there are laws. You can't wait that from someone who doesn't know that they even live in some country's territory.
No. I don't expect they'll know the law, which is why they must be contacted and be told what they can and can't do. That's the role of the government.