Your view of morality is very simplistic, do you believe that a 2 year old child innocently pulling the legs from a spider has the capacity to know evil?<quoted text>
But what about a person who enjoys pulling humans apart and eating their hearts and stomachs when he doesn't know its wrong, he may not know he's wrong, but simply the act of killing a human, having that desire to kill them, that lust to kill them, should still make them evil, it is the heart itself, the evil mind to kill that makes them evil, not knowing its wrong. The same with Adam and Eve.
If we look at a crime there must be 2 components for a crime to be a crime, mens rea and actus reus must be concurrent.
There must be guilty hands and a guilty head.
From where did eve acquire the capacity to know she was doing a bad thing before she had the knowledge which she achieved by eating of the tree which was the 'bad thing' gave her the knowledge of good and evil[after the fact].
It just doesn't compute on the most basic level.