What is the rhetorical effect of Ras' getting hit by a spear

Ras has become the Destroyer and rides in on a large black horse dressed as an Abyssinian chieftain. His disguise crushed, Ras notices the narrator and throws a spear down at him, calling him a betrayer. The spear is a symbol of Africa, perhaps the savagery of the black man used in a race riot by black men.