Sometimes, some practices are good to hate - things that cause the needless suffering of others, which includes slavery; sex with children & animals; torture...
It would be hard to film the practices actually happening; kinda like expecting being able to film crimes in order to substantiate them, rather than allowing witness testimony & forensic evidence.
The Brazil government was debating the controversial "Muwaji's law" which was the brain-child of Brazilian Congressman Henrique Alfonso, who stirred controversy by trying to legislate parents' rights to home-school their children. I don't know if it passed or not.
Some doctors and anthropologists are adamant that no one should interfere with the tribes' cultures. But other Indians object to certain of the practices.
Mothers who are forced to kill their babies or abandon them to die in the forest often commit suicide. The children are killed because they are disabled, or female, or from an unwed mother. they are buried alive because if they die while their face is above ground, their ghost will come back to haunt the tribe. If they are deformed, they have a "monkey soul" and not a "human soul" and also must be killed, altho poisoning & abandonment is acceptable. In some ways, I see this as a "women's and children's rights issue"
Atini is a group dedicated to helping indigneous peoples. They claim that the Indians are more threatened by the ranchers, miners & loggers than the missionaries, but the missionaries are being targeted in order to take the attention off the former groups.
Here are some articles, if you want additional information on this topic:http://abcnews.go.com/Nightline/story?id=6788207&page=1http://www.telegraph.co.uk/news/worl...by-burial.html