What's necessary, and what indigenous groups have been demanding for centuries now, is for every treaty to be respected. What they need is the full right of self-determination, up to and including secession. This has been demanded. The reservation system isn't sovereignty, it's apartheid. You're describing these relations the same way Zionists describe relations with the Palestinian Authority.
It isn't about "flash," it's about what's both necessary and possible. We absolutely can decolonize Turtle Island (the north American continent), but Democrats and Republicans alike perpetuate settler-colonialism. Again, join an org, fight for a better world.