Whether they should be allowed to own a club in the premier league is irrelevant, they do own one.
And unless the law has changed since I last looked, there is no death penalty in the UK, Saudi Arabia has no legal authority, and they have shown no inclination to punish people that speak negatively about the football club.
The implications for football and football clubs are zero. It's one of your more ridiculous ideas, and really nothing to do with football or this message board.
Sportswashing at its finest.