They hate that you're clever, and they despise a fool
Not to be that morbid guy but I'm very curious on how that happened exactly. I'm guessing he used his trunk and a feet or something?
An elephant geek getting mad at a human being is like a human being getting mad at a banana, and the condition of the victim will be much the same in both cases.
This is why elephants are only considered "semi-domesticated".
They hate that you're clever, and they despise a fool