Trash talking is part of the game. But to take the fight outside of the octogon, was way to much. This behavior is so thuggish that it will take the sport back it Dana White doesn't step in and come down hard on this. What is Khabib had hit a fan? Even by accident, it would be a lawsuit of millions. There has to be a strong message sent to all the fighters that you keep it in the Octogon.
I would strip Khabib of the title and fine him. Ban all of his team members that entered the octogoan for life from all UFC events.
No self contol, no career.