Family Feud- Fh’s Older Brother

So, this isn’t my “beef,” but my FH had a “text argument” on a group chat their other siblings and parent shares. He was asking about something wedding related, and (as usual) his brother was being a clown. This time he clearly took it too far when he stated that no one asked him if his daughter could be our FG. That he needed to be consulted or something even though his had been arranged months ago; he said they’d do whatever we needed them to do and so on. Now the FH doesn’t want to invite him and his entire family. We are two months out (I don’t care if we have a FG). What would you do in this situation? Between his parents and this sibling, I know they are driving him crazy.