I side with the United Airlines, this man showed no manners and being a doctor doesn't give him the right to act like a child.  I've was ask to get off of a flight,I did and I've been ask several times to give up my first class seat so a family could sit together, like with children.  
Now they need to lock him up for interfering with a flight crews duties, he's also shamed his race.
Not only that his actions threaten and endangered the lives of the passengers and crew.
Your asses can't be kissed all the time growup act like adults be prudent,
Or the next time I'm asked to politely get off or change my seat, I'm going to lay on the floor kick and scream like a kid demanding my rights that are not mine.