Sovereign citizens believe that the government has no right to tax them, issue licenses, or do many of the other things that the average American citizen has accepted as the roles of government. They also believe that the only legitimate law enforcement officer is the elected sheriff.
If a suspect is trying to choke you, you are in a deadly force encounter and accessing your handgun would be appropriate. But depending on what direction the bad guy assaults you from and the accuracy of your shot placement, your gun may not always provide the best immediate option.