Board Thread:Theories and Speculation/@comment-33005792-20170901151707/@comment-734582-20170902075522

Elveonora wrote: In my opinion, Kara is an anti-Otsutsuki group that formed long ago in order to prevent their arrival and plans to claim the Earth. Your theory is promising, though i think there's something that needs to be said: There's no actual reason to believe that the Otsutsuki race consists solely and uniquely of the Otsutsuki clan. It could be other members of this species that formed Kara against the Otsutsuki.

However, yes, it seems likely that Kara exists to fight against the Otsutsuki homeworld. Elveonora wrote: They didn't make themselves known when Kaguya returned to maintain secrecy and they didn't show up when Momoshiki and Kinshiki arrived because they knew that Naruto and Sasuke can handle them just fine by themselves. Or they had bigger fish to fry during the 1000 year period, like defending from outside threats, and weren't anywhere close when Kaguya returned. After all, if they are some sort of terrorist organization against the otsutsuki clan, then they would likely be enacting their plans offworld.