The Mob is a crime organization that owns the Nero's Palazzo casino in Las Paradiso, which is run by the Molinari Brothers. They have mobster gangsters in their employ and long, black vehicles for transit.
The Molinari Brothers have sent their mobsters to attack Crypto at the Space Dust casino. He, of course, destroys all of them. In retaliation, Crypto body snatches the Don and cuts the Molinaris off from "the family". He destroys their businesses, their assets, and their casino, with the Molinaris still inside.