Sorry to drag this up again, but I was just wondering if it was a possible army to pull off (fluff wise). I hear many people saying Tau are totally immune to chaos, though I cant see how this is possible. Chaos is everywhere right? It just festers and corrupts, so surely any race is at least viable to be a candidate for mutation/corruption. I guess what I'm asking is if there is a fluff reason that Tau are so immune to the taint of chaos? So any fluff people out there tonight?

After all, if a Space Marine can be corrupted, why not a Fire Warrior?