With a universe with Nephilem, Mantu, and who knows what else out there, I'm glad the Kilrathi are around to act as a speed bump for alien invaders.
Me, I always thought of the Kilrathi and Confed as being like the Scots and the English -- a warlike society based on clans in close proximity to a domesticated but organized society. Fight like cats 'n dogs for hundreds of years, then join together to build a worldwide empire (or galactic, in this case) for the benefit of both.
There's only one thing: Apparently, the Kilrathi have not invented bagpipes, thank God.
Respectfully,
Brian P.