@mvhvtmv: Because they've been fighting the machines for hundreds of years and all they've seen them do is kill.But mostly I think it's meant to be a statement on xenophobia. The androids have had it drilled into their entire existence for being by their creators and commander that machines are mindless killing machines. They have no reason to believe otherwise until they start encountering hard proof to the contrary. The android society is not one of critical thought and outward compassion. Their purpose is to eradicate the machines.