KADUNUNG, Nigeria — Authorities declined to acknowledge that Muslim Fulani herdsmen were behind a rash of recent attacks on Christian communities in Plateau state, Nigeria, that took 38 lives and displaced 5,000 people. More than 100 armed Muslim Fulani herdsmen attacked the Christian community of Kadunung, in the Mangu Local Government Area, on Sept. 16. About 150 houses were destroyed…