Although i have no direct knowledge of the Nigean conflict, I have found most conflicts in Africa have more to do with tribal divisions than relgion.
ManaJean seems to confirm this by references to
Divisions accentuated by system of classifying people as indigenes and settlers
-Hausa-speaking Muslims living in Jos for decades are still classified as settlers
-Settlers find it difficult to stand for election
Divisions in economic status, language and political power are important throughout Africa.