I think even this is missing why Sorkin's response is childish.
Sorkin responded to a criticism (being called an opportunist) with another criticism ("well you're an opportunist too!"). It's like a child responding to an insult by throwing the same insult back. It doesn't make the criticism wrong.
The fact that his response is pretty weak and arguably untrue is beside the point that it's just a childish response in the first place.
So what you are saying is that's it's okay to criticise someone, though that party is not allowed to point out the hypocrisy of the position you both share?
Childish is the insults on this thread thrown at sorkin...
Excellent click bait article though . Working a treat .