In my opinion, the smirks and faces made by all of them and Alex’ overall behavior in the Russian restaurant was rude and extremely disrespectful. They all need to be taught manners. I was raised in an Italian American family and, if I ever acted like that, I would’ve gotten an uppercut right at the table.
I agree with ShortyMac, enabling Alex is doing him no favors. If the kid has psychological issues and is not just extremely spoiled, then get him professional help.