-SUPPORT
Now, I've been away for a very long time, so I don't know this staff member. I want to make that known just in case anything comes up about me siding with staff because I know them.
First and foremost, you have to understand the climate with certain things in society today. Some things can't be said now even in a joking manner because someone may take it the wrong way, which in this case I can completely understand.
Am I saying that you feel bad? Not at all. But it does state in the MOTD that jokes of that nature are not allowed. As stated before, your ban was initially done for 2 weeks, removed and reinstated for a longer time due to a second opinion from other staff, which is completely allowed btw.
Overall the best piece of advice I can give you with this scenario is try not to be hostile (I do get the vibes, no offense) and try to defend yourself in a respectable manner. Worst case, just take some time away and try to work on stuff like that because something that may be a joke to your and your friends, isn't exactly cut out as a joke to everyone else.