I haven't seen this movie but I've seen the documentary. The main culprit of their extinction was genocide by the white population incl. disease and starvation. However, why is it in the plot summary it says they clash with other tribes which sounds like it lead to their ultimate demise. If this is how the movie is, then it's another Hollywood propaganda sensitizing the truth. The Yahi was exterminated by white people, by the time of Ishi feuding tribes were unheard of because they've been eradicated by that time. So, I wonder how many flaws and false information are in this movie.
Also, Ishi wasn't found on a horse. He was found hiding in a barn and the owner pushed him down in fear.
Also, Ishi wasn't found on a horse. He was found hiding in a barn and the owner pushed him down in fear.