Jokowi’s campaign battle shows Indonesia’s religious identity crisis

Indonesian President Joko Widodo is one of Indonesia’s most devoted crusaders against fake news, and for good reason: It is personal.

The leader, known as Jokowi, who is campaigning for a second five-year term, has sought to keep voters focused on his track record of infrastructure building, tax reform and lower food prices.

However, social media-driven rumors — that he is not a pious Muslim, that he sympathizes with the banned Communist Party Indonesia, that he...