Did I mention natural behavior? Did the comment I responded to mention natural behavior? How is natural behavior relevant to the discussion between OP and I? What is the point that you are arguing and why are you taking it up with me? Further, how are you defining natural behavior? Can natural behavior change over time, in response to external stimulus?
Don't be sad. For grown ups its normal to live with objections. You'll learn.
> How is natural behavior relevant to the discussion
Original post: " Perhaps a particular chimp or gorilla was having a really bad day and just went out looking for a fight." that implies natural behavior.
So it doesn't seem that's their natural behavior. So how's that relevant? Oh wait it its, just exactly the opposite of what you said! Nice.