My bad! The reference in the documentary I saw, was actually to the Hutu Farmers of the Kilombero flood plains.
However, it does lend additional credence to the observation made in your post about the underlying root of all conflicts being ethnic, cultural and thus nationalistic in scope.
The semite Tutsis, are culturally, nomadic cattle herders, and the Hutu are culturally agrarian.
I find it quite interesting that throughout history, the Semites and Neanderthals have harbored an extreme dislike for tillers of the soil, even among their own kind. The name "sod buster" was used disparagingly, by early European settlers of the American West to differentiate between herders and farmers, and both held eachother in mutual contempt.
Enslaving Africans was just another way to reap the rewards of their labor without paying. The Semite uses guile while the Neanderthal uses war or brute force.