Sabinlerose said:
Which still makes them innocent.
They can't be expected to know Humans are intelligent.
They are plain old civilians. I don't think they are quite privy to what is surely advance military technology.
Might as well say the Innocent civilians killed in the middle east as a result of 9/11 aren't innocent because they share the same religion as the extremists who carried out the attack.
The girl Kei took hostage was a civilian, and she found a way to communicate with very little effort. She was hardly surprised that we had a fully translatable language. (would you consider communication as a possibility if you were cornered by something of cattle-intelligence?)
They're capable of communicating, and they've looked down at cities that resembled their own (albeit smaller), yet they don't blink gutting us. So I find it hard to say that they all still believe we're unintelligent at this point, or whether or not they'd even care if we were.
I doubt this is the first planet they've harvested.