This is hypocrisy and corporatism at its finest.
Sheldon Adelson isn’t morally opposed to online gambling. He is opposed to losing his profits and share in the market. He is just trying to use his police power in government to “regulate” the online industry.
This is why regulations aren’t regulations. They are nothing more than protectionism for the politically connected elite.
Sheldon Adelson is just another corporate fascist who is afraid of losing money.