Emerald Forest is certainly guilty of oversimplifying the displacement of tribal peoples, but I remembered it fondly. I watched it on video, soon after it came out, and again this morning. I found that I had long since forgotten all the flashy aspects of the plot (the cannibals, the machine gun and the sex slavers), but remembered the courtship ritual very clearly. The parts I had forgotten seemed a bit forced, harder to believe.
After my first viewing, I was certain that "Daddee" Bill had blown up the dam. Now I'm not so sure it wasn't coming down anyway.
Also, it was hard not to be reminded of Jungle2Jungle (http://www.imdb.com/title/tt0119432/) while watching it now, especially where the son mystically finds his father's skyscraper apartment in a large city.