Very simplistic. No, it is not easy to change borders, once vested interests are in place. Try changing some borders in Europe and see how that goes...Complete nonsense. There is nothing stopping Africans from peacefully redrawing their borders except for other Africans. Imaginary lines drawn by Europeans do not magically make Africans kill each other, Africans kill each other because they choose to kill each other.
With countries set up to fail, to remain dependent, and with Western-backed corrupt governments in place, social dysfunction and conflict is inevitable.
Africans no more than Bosnians or Irish or anyone else "choose to kill each other". They are propelled by social forces just as surely as a soldier drafted into a war.