Maybe you are being misconstrued because you are implying that we are saying the pony is being aggressive towards humans. None of us did. We are all saying that it is wrong for the pony to kick when you are there no matter what. Period. You (the human) are the herd boss. Stupid pony should know not to kick, even at the other pony, when the herd boss is there controlling the situation.
No more to it than that.