Let's say Hitler was walking down the street one evening, alive and well and a hundred and twenty or so. It just so happens that this street is in the bad part of town, so it comes to no surprise when some socially maladjusted punk comes up, stabs him to death and steals his Social Security check. Was that a moral or immoral act? Most people would agree that killing Hitler is a good thing. But the person who killed him wasn't aware of who he was, and killed him out of greed, which most people would agree is an immoral act. So was the act moral or immoral?