The results of believing that your religion is the exclusive "Word of God":
"... Humans develop myths, each generation adding or subtracting details... There is no particular harm in all of this -- until the point is reached at which such creative interweaving of fact and fantasy, history and dreams becomes codified and perceived... as the Word of God. At that fateful point, the clouds of time darken, and the tribe marches forward to misunderstanding, hatred, and, inevitably, bloodshed."
source: 2000 Years of Disbelief, editor James A. Haught