I am unbanning you this one time. I am not terribly impressed by your plea considering you had to stand ON the sign asking you NOT to kill the obviously on display, specially-dressed mobs contained in compartments in the wall. It was quite clear they were there intentionally and as a decorative feature of the build even without the signs. It was incredibly disrespectful of the other player for you to kill them.
If something like this happens again, you will be perm banned and no plea will be considered. When you join the server please visit /spawn and re-read the rules. It is very important that you know and understand them. Thank you.