Jeffrey Kaplan  wrote in 
news:ogbjv75bubch959jmaqu5pt2g4h2ii6k6m@gordol.org:

> I just rewatched "Believers" this past week, and a piece of dialog
> between the Plot Of The Week and G'Kar has stuck me as undefined, but
> traces back to "The Gathering".  When M'Ola and Tharg ask G'Kar to
> intervene on their behalf, they are appealing to his people's hatred of
> "the Earthers".
> 
> Was it ever mentioned anywhere why the Narn hate the Humans at this
> point in the story?  The reason for the Narn's hatred of the Centauri
> is, of course, well established back to the pilot, as well as the
> strained relation between the Minbari and the Humans, but not this one.

You have the causes but didn't connect them.  IIRC Earth had first contact
with the Centari.  When the Narn started to communicate with Earth they
let Earth know about the troubles betweeen their races.  Until there was
some reason for the Narn to trust that Earth might be friends, rather than
enemies due to their prior association with the Centari, there was 
considerable doubt about their relationship.

In other words the Narn hate or distrust the Earthers because they first 
had contact with the Centari and thus must themselves be untrustworthy.
--- SBBSecho 2.13-Win32
 * Origin: Time Warp of the Future BBS - Home of League 10 (1:340/400)