>>103670420
The Tau are the closest ones of "good guys" in 40K
They are the newest small power in the galaxy so if you get invaded by them, they will try diplomacy first before they attack with bombs (which is way fucking nicer than the other options, besides they will try to avoid as much civilian casualties as possible)
Reason why most Imperium fans hate them because
>NOOOOO, YOU CANT BE NICE IN THIS SETTING