You can read the sorry story in the The New York Times.
People are killing each other in Jos, “a picturesque city set on a verdant plateau in central Nigeria”. At least 400 bodies have been recovered as I write and about 7,000 people had fled the most violent neighborhoods for shelters. (1,000 people died in Jos in religious riots in 2001.)
Elections have not been held in Jos for years, in part because of fears that the political parties would split along religious lines, which is in fact what happened.
Why are people killing each other in Jos?
Because they believe different things about absolute bloody nonsense.
Say what? I, we, should be tolerant of religion?