I guess this bit is the source of my thoughts.
Unite? Yes. Potentially workable
Piece? Peace? Not so much.
He launched several attacks on civilian settlements in the US, slaughtering men women and children, while simultaneously there were (relative to modern understanding) nameless indigenous leaders trying to evolve their culture with the Euro culture to be one, in peace.
If you believe in such things, Geronimo might arguably be the reincarnation of Tecumseh. Brilliant, a bit mad, certainly extreme, and undeniably admirable.