I don’t think enough retellings of the Cain and Abel story make note of the fact that nobody had ever been killed or even died before when it happened. Cain had no idea beating his brother to death could possibly be a bad thing
Cain really did fuck around and find out
Got gets really pissed at people doing things they dont even know would happen. Eve was never told to not eat from the tree, only adam was AND before the fruit of knowledge they didnt even know what good and evil were.