Any mistakes the doctor might have made in his past have nothing to do with this vicious attack by United Airlines.  The value of United Airlines stock has now dropped over 750 million dollars and will probably continue to drop as more people view the video.  Several million people from around the world have already viewed the incident and there are calls for boycotts by Asians especially in China even although he was originally from Vietnam. 
 Why didn't the airline just offer more $$$?  If they would have brought the offer up to a couple of thousand, there probably would have been many who would be willing to give up their seat. The real problem is that they wanted their seats for their own airline employees who could have taken an earlier or later flight.