I am simply pointing out the difference between police officers and people who are not allowed to carry guns or make arrests, and who behave like thugs.
For all your deference to law and order, you certainly seem to get a weird thrill out of United breaking the law wholesale in their treatment of Dao.
United Airlines Corporation was probably wrong, however only stupid jerks get their teeth knocked out resisting law enforcement personnel. If Dao figured United was doing him wrong, and if he had an ounce of brain in his head, he would have fought them in court. Dao is an arrogant jerk who thinks he is superior to law enforcement people because he is a doctor.