The stranger offered a glimpse of Baroka's weakness despite his old age and the authority he hold in the village as the chief.
Sidi's rising influence in her village and beyond is a result of the stranger taking photographs of her in various postures and getting published in a magazine in Lagos. Her photos are published in three-full cover pages. That of Baroka appeared in a small section of a page of the magazine close to the toilet.
Baroka knew her influence due to her beauty as expressed in the magazine would threaten his authoritative influence in the village. He sought to diminish her influence because he didn't want to be rivaled.
Also, the stranger portrayed how backward the Illunjire village was in terms of modern development. They had never seen a motor vehicle, a motorcycle or even a camera. They called them names they were accustomed to e.g. calling the motor car the stranger was driving on as a horse. This further explains how Baroka has contributed to lack of development in the village.