A book about this very issue and tribe came out in 1995 "Savages" by Joe Kane. It is a very interesting book and I highly recommend it. In 2006 a similar tribe in Columbia was able to defeat Occidental petroleum which pulled out of that area. This is another side of the evils of oil and people need to think long and hard before buying a SUV or large gas guzzling vehicle.
Good news, with a caveat, Brazil's President has been compared to tRump, so who knows what may or may not be enforced.
People don't realize the rain forests are resilient and if we leave them alone and stop cutting them down, for instance for making groves of just palms for palm oil, they grow back. I have a friend who buys farmland of those that own land, but to get it had to clear part of rain forest for farming or raising cattle. He teaches the native land owners and teaches them to grow cacao and coffee and sell it as fair trade. they make more money since it grows naturally there. He said in a few years the part of their land they cleared decades ago is taken over by the rain forest, again.
The Amazon Rainforest provides 25% of the Earth's oxygen.
@LiterateHiker I know and why so important to preserve it. The palm industry buy moles of rain forest and burn it down because of the big demand for palm oil. I buy nothing with palm oil