Long-dormant pilgrimage route focuses on Jesus' post-Christmas journey.The sound bomb exploded right behind the Egyptian Museum on Cairo’s Tahrir Square, throwing Ibrahim Morgan’s Swedish tour group into a temporary panic. Then they settled back down and finished their tea. This latest tactic in Egypt’s Islamist insurgency is meant to instill terror without harming civilians. It seeks to convey a message to citizen and tourist alike: Egypt is unstable. This has been the dominant narrative abroad regarding Egypt, thanks to three years of instability, four presidents, and two revolutions. However, some locals like Morgan disagree. “We know it is nonsense what...