Few moments conjure as much fear in South Sudan as the massacre of Bor. Long before South Sudan became a nation, while it was still in the throes of one of Africa’s longest civil wars, fighters tied to a leader named Riek Machar stormed through the city of Bor in 1991, killing 2,000 fellow southerners in an attack that would lay bare the deep divisions in this impoverished land. Since then, the people of South Sudan have had periods of peace, compromise and even shared jubilation at the birth of their nation in 2011. Mr. Machar himself became vice president, apologizing for the massacre. But there was never a real and lasting reconciliation between the factions threatening to pull this new nation apart, and on Tuesday fighters allied with Mr. Machar charged into Bor once again. “This was a fire waiting to be ignited,” said […]