PostFactum PostFactum:
The want, during thousands of years they were living in their areas without problems
Brother, African history is far, far bloodier than European, Asian, or even Islamic history. Their oral histories of wars read like pulp fiction to Westerners with bloodshed on an utterly unimaginable scale of brutality.
I assure you that without European influence in Africa there would be far fewer Africans today as they'd have kept Africa the abbatoir that it was when the first Europeans arrived. The Europeans, especially the bloody Belgians, were no paradigm of virtue. But they didn't slaughter whole tribes of people because they at least valued living Africans for cheap and slave labor.
In most modern African countries even today it is not uncommon for tribal wars to break out simply because someone rode a horse on the wrong road or some other trivial action that stirred up dormant blood feuds of the past.