Blade Runner
Misunderstanding(maybe!): The exact nature of the replicants, many viewers believe them to be machines in the classic sense. The film is very vague on this probably by design. I have seen people say who cares about the replicants, even if they are sentient they are malfunctioning robots so kill em all!
But we get hints they are biological, maybe even genetically altered humans. The film makes a lot more sense this way and has no easy answers.