The correct way to do this is to stop mentioning it and let him come back thinking you were done, and then hammer him with it the day he does come back. In the end I can live without his answer and presence.
I would disagree a little. They say a coward dies a thousand deaths, and in this case it has to be the same. He is coming in and not saying anything which has got to be eating at him. A person who is over it eventually goes away finding a new place to enjoy. By leaving him on the roles and allowing him in to see what happens you actually hang him worse than that other guy who recently got banned since dinner has silenced himself.
See, staff? When you make even the tiniest tweaks at putting a foot down on hate speech, the trash takes itself out. It happen too after Lanz sold the board to Anc and Gul, and those clowns didn't even stick around for any official policies.
I seem to be doing fine. You might want to drink some more of that kool aid if you want to go to fantasy land.