Anybody who wants to explore anthropologically the possible tribal role this role of kind of insidious tendency to scapegoat an outgroup (that seems to be an intrinsic part of the way cultures use language) might possible have had in the origin of language itself, check out the work of Rene Girard.
tl;dr: Girard thought that scapegoats were among the very first things we had words for as a species, because of the adaptive group response that sacrificing a scapegoat had in bringing together the accepted members of the tribe together in rallying against the scapegoat and the outgroup he or she represented (be it a competing tribe, or simply weird or "witch-like" behavior at odds with the norms of the tribe).
Girard saw Jesus Christ as the central figure in history that for the first time in a very big way sought to put an end to sacrificial violence against scapegoats, by dying for all of mankind's sins once and for all.
tl;dr: Girard thought that scapegoats were among the very first things we had words for as a species, because of the adaptive group response that sacrificing a scapegoat had in bringing together the accepted members of the tribe together in rallying against the scapegoat and the outgroup he or she represented (be it a competing tribe, or simply weird or "witch-like" behavior at odds with the norms of the tribe).
Girard saw Jesus Christ as the central figure in history that for the first time in a very big way sought to put an end to sacrificial violence against scapegoats, by dying for all of mankind's sins once and for all.