Some people can be too extreme even for Islamic State.
The self-proclaimed caliphate’s biggest and deadliest franchise outside the Middle East, the “West Africa Province” also known as Boko Haram, fractured in recent weeks over Islamic State’s decision to replace its notorious leader, Abubakar Shekau.
Mr. Shekau hasn’t recognized the August appointment of a rival Boko Haram commander, Abu Musab al-Barnawi, as the group’s new “governor.” The two factions have repeatedly clashed since then and their followers have accused each other of abandoning the true faith.
This split, while weakening Boko Haram in the immediate term, could have dramatic consequences for how jihadists continue their struggle in Nigeria and in neighboring countries. Boko Haram’s areas of influence were cut down by the recent offensives of regional militaries, which were aided by U.S., British and French advisers. But the group still controls large chunks of northeastern Nigeria and operates in parts of Niger, Cameroon and Chad.