NAIROBI, Kenya –Far from the world media’s gaze in remote islands off the eastern coast of Africa, church buildings are razed and Christians are ostracized and imprisoned for their faith – leaving one with a skin disease. On Tanzania’s island of Zanzibar, in one week-long stretch last month Muslim extremists destroyed two church buildings, Christian leaders said. The extremists torched the building of the Pentecostal Evangelical Fellowship of Africa in Mtufani Mwera, about 12 kilometers (seven miles) from Zanzibar town, at 7 p.m. on Dec. 3, said Pastor Julius Makoho. Damages were estimated at 1.5 million Tanzania shillings (US$9,350). “When...