[@Jbcool]

The interesting part is that Tzeentch could be giving him a little bump in the right direction... or not. It's rare for the forces of chaos to try and corrupt the Tau because Tau souls aren't bright enough to actually be seen from the warp (At least that is my understanding of it) and their belief in the Tau'va (The Greater Good) gives the race a mind set that Chaos has a hard time corrupting. It's generally a case of it being a lot of hard work for very little reward.  

However, as was seen in the Fire Warrior Novel/Game, it isn't impossible for one of the Chaos Gods to give the Tau a bit of a boost...