First, if you're considering bringing this dude back, make him wait till he's 18. By then people should grow out of their edgy state as far as I've seen. Question his intentions and make him consider if he's ready to act appropriately in the server.
Second, mind telling us the offense in question?
My take is that this apology isn't wholehearted. He'd rather blame the alt-right and neurodivergence for his mistake and beat him over them rather than be accountable for them. He labels the content on his profile as "cringe shit" but hasn't described the changes, if any, he's made (or attempted to) to signify that he's "[made] amends," and instead tried to post on the furries stream right away to make this apology. It's a shallow attempt at best to regain his spot in the server for something he's "gotta do," whatever that entails.