Originally Posted by
Caerule
The Nerubians we kill are those taken over by the Scourge. The few remaining living ones, are not hostile to us.
We can't be sure how friendly the Nerubian empire was at its height. But they were cultured and practiced magic. I believe Malygos is even hinted to have spent time among them in insectoid shape. Still, neutral refugees isn't enough to assume they were friendly before. The Klaxxi for one may have been accepting of our aid when they faced a greater threat, but they were undoubtedly evil. It were the Klaxxi priests that kept the Mantid people to worship of the Old Gods, controlled and replaced queens, and kept their people to their military cycle of invasions.
I'd love an insectoid race on our side though. Possibly as new race. A void-based expansion sounds like a great time for it too.
After all, the Aqir used to be a slave race to the Faceless. What if there is still a colony deep beneath the earth, now forced to the surface due to N'Zoth's growing tendrils and influence beneath the earth? Sounds like a perfect candidate of displaced people to seek refuge with the Horde.