There are many different tribes in Africa and some are more warlike than others. There are on going feuds which date back centuries, such as the Huti vs Tutsi which led to genocide in Rwanda. This is referred to as tribalism rather than racialism.
You could have two aggressive groups engaged in a civil war over oil, such as Biafra in the 1960s. However if you move a few hundred miles you might find a peaceful country with nothing to fight over.
Botswana has very few problems and flying there wouldn’t be too difficult. Angola, Nigeria or the DRC need special characters working there.