Bling bling, after a fashion.
I'm not going to say that's it's inherently wrong for 'the White Man' to own Wounded Knee. In my eyes that's not the crux of the issue. Surely everyone would be uncomfortable if say, the Round Tops at Gettysburg were privately owned, and said private owner was using this power as a manipulative cudgel. Everyone would agree that this would be tawdry and wrong and there'd be no talk of political correctness or anything like that.
I've heard that Depp's turn as Tonto in his latest movie is truly awful. Haven't seen it myself. Truly though he is far past the point of being the lovable generation X eccentric and is now just another entitled A-lister who can cause a small nations worth of economic damage with any random stupid whim he might have. More's the pity. But his interest in Native affairs seems mainly unaffected and good all the same.