It's true that tribal rivalries have something to do with political instability. It's also true that those rivalries were exaggerated by colonialism. Colonialism essentially insulted the tribal territories, and as a result, nations came to be composed of an agglomeration of many tribes - 65 in Burkina Faso alone. The Mossi majority sees itself as the owner of Africa; others are just negotiators for representation. That is the way it is now, and it is the sole responsibility of colonialism.