Bronson, I can't seem to edit my post (on my ipad), but I read your comment again and I realized that you were talking about "affiliated tribes" and not the Sioux with regard to oil revenue.  My mistake there.    

I can't say what the impetus of other Tribes are or why many Native Hawaiians are there - I can assume, but I can't say for certain.  So, instead of making those assumptions, I'll just say this.  The Sioux have an issue with DAPL being built over contested lands that they claim as their ancestral lands and the U.S. Supreme Court has previously supported the idea that those lands were unjustly taken from the Sioux.  

As Americans, they most certainly have the right to protest the actions of government (as the permitting came through a federal agency and on federal land) even more so if they have a legitimate interest in the action (which they do).  

Whether or not we need an oil pipeline or whether or not pipelines already exist is beyond the crux of the issue.