is zack evil? what does it mean evil?
his nature bring him to destroy, to question any rule... is this evil?
in nature there are some forces that bring to changes, to destroy the old... this is a part of the process, of the cycle of creation and destruction.
the tiger kills old an sick animals: is it generous? is it evil? it's just a tiger. but if we tame the tiger and she becomes like a cat, we make a bad tiger. the tiger loose its position in the nature.
the same is for zack: culture, schools, work are trying to tame his nature, to make him artificial, sophisticated.
one time a japanese buddhist monk went to italy, to the catholic "comunione e liberazione" congress and he asked to be brought to mussolini's tomb to pray. it was a big scandal: "why do you want to pray on his tomb: he was a bad man!".
the monk replied "it was just his karma. he need someone to pray for him. he had to follow its destiny".
no bad nor good: everything is just conventional, relative to specific time and place.