Board Thread:Warhammer 40k General Discussion/@comment-25177957-20140720052135/@comment-72.93.39.135-20140723001526

I get it but ratlings? That is too degenerate for me to see it.

Emperor wasn't just sparing the Eldar he accepted them as mutual participants in the galaxy. The Eldar were aggressive in those days (still are) but they had mutual relations and joined against Orks often with the I. I can't see why the same case couldn't be made for another humanoid civilized xenos race. The Imperial Creed isn't that bad, the Imperial Truth was obviously flawed as well.

More on the Tau being the weakest: It is hinted that they may be influenced by Chaos. When the Imperium first discovered the Tau there were heavy chaos storms that prevented the Imperium from making planet fall and they had to leave it alone, allowing the Tau to become what they are today. Regardless of their advancement, which may be due to deamonic intervention, it is never beneficial to be a puppet of the dark gods.