One of the lesser-known scandalous from American history (there’s many to choose from) is John Muir’s campaigning for the National Park Service, which is often celebrated as a great victory of environmentalism. What they don’t tell you is that Muir saw the indigenous people of California and the Pacific Northwest as ‘savages’. The NPS meant that thousands of people lost their lands, lands which they had tended for centuries, but which appeared to White observers as merely ‘virgin forest’.
Land back!
I’d say that depends on the specific land and the specific Indigenous groups. Round here an indigenous corporate entity is one of the worst polluters and GHG emitters and they are currently driving a critically endangered native beetle species extinct by converting the only bit of native forest they live in into profitable dairy farms.
What works in the Amazon won’t necessarily work everywhere!