If it was more than just jokes, then Disney wouldn't have had to fire him, because people in jail don't usually show up for work.
But what you seem to be proposing, is that Disney didn't have the right to fire him for some disturbing jokes.
A corporation has the right (and the obligation to it's shareholders) to dismiss any employee that they feel in the long or short term, will cost that corporation money. It happens all the time.
I don't get to go to work all week, and then on the weekend make a public tool out of myself, and expect my employer to keep me on the payroll.
I understand that comedy is supposed to be edgy. It's up to the comedian to know what their employers, or future employers, will tolerate.