An obvious phenomenon depicted on the map, on the right, is that Islam dominates the northern regions, and cuts through several African countries such as Nigeria, Chad, Sudan, and Ethiopia. In each and every country where there is religious division, there is also conflict of some sort. The map also displays how Islamic influence in East Africa is surging downwards towards the south, where it has dissected Kenya, Tanzania, and Mozambique.
It’s ridiculous to claim that traditional religions exist in only 4 countries in Africa. I’m not sure who made the map or what they were peddling, but there are many millions of tribal peoples througout Southern Africa who have not adopted either Islam or Christianity.