Are you deliberately trying to be provocative, OP? I find it hard to believe that anyone can be this uninformed, coupled with such a massive white savior complex.
For a start, isolated tribes have zero resistance against the diseases strangers carry with them, which is reason enough to leave them alone.
To address some of your other points:
Whilst I can understand the distaste for having a camera filming people, it's nothing like a zoo. According to the article, the cameras are only in the specific place where the National Indigenous Peoples Foundation leave metal tools, to discourage people from the tribe from venturing onto farmland and being killed. I can also understand why the Foundation want the cameras, as it's proof to the loggers/ranchers/Government that there is a thriving community living in the forest. (The indigenous tribe are obviously aware of others, and could avoid this spot, if they chose.)
Yes, obviously you can have two levels of law in a state. Perhaps do some research on tribal law to develop your view.
Excluding the fact that some countries already have tribal laws, federal tribal laws and state laws co-existing, socities like the UK approach crime and punishment differently depending on one's background, sex, class and fortune. Nowhere has the sort of single, blanket equitable legal sytem that you seem to believe exists; and we certainly are not all equal under law.
You seem to think tribes are lawless children that need protecting from their ignorant, dangerous ways. If they have a law against killing without reason, then they will also have a punishment.
I don't even know where you're going with your bizarre comment about burning witches at the stake. All of humanity has, at one time or another, done appalling things to one another, and we continue to do so. This isn't limited to isolated tribes.
Your continued suggestion that we should intervene because the tribe has a right to vaccinations etc., suggests you think our ways are somehow superior. The tribe wouldn't need a vaccination against measles if we left them alone. I am sure they also have their own medicines and healers. They are also clearly aware of the existance of farmers, so they could interact, if they wished to.