JOSEPH HANLON WHEN the uprising started in Cabo Delgado, Mozambique’s northernmost province, in 2017, the insurgents used the only weapons they had: their machetes. And they cut off the heads of local elites whom they accused of being allied to the leaders of the ruling Mozambique Liberation Front (Frelimo) in stealing the mineral wealth.  Forty years ago, there was another civil war in Mozambique, in which the Mozambique National Resistance (Renamo) committed atrocities such as burning people alive in buses. But Renamo had been trained by the apartheid military, many of whom were believing members of the Dutch Reformed Church,…