A few points.
The captain is very well trained in that he is communicating with the fire services that arrived on site "with in minutes" getting a better account of the situation while going thru a check list - what does the second pilot do while the communication with the fire services is happening?
The captain the person in charge is said to have made an announcement about smoke coming from outside and there was no danger!
Now I do believe once there is smoke in the cockpit there are procedures for flight crew to follow. Don the mask!! at this point the flight crew are in a different environment to the SLF and cabin crew. So the level of toxic smoke in the cabin will not be known as safe or not by the flight crew - a professional would follow procedure wouldn't they.
If the announcement was made by the captain, then clearly it was not presented well enough, and the captain lost control of his ship as a door was opened before his command.
As a result a person has sustained serious injury and the person in charge is responsible and accountable.
In hindsight the captain may have made a different announcement that contained more detail, in a different tone or requested a translated announcement by cabin crew or others - I don't know what options he had open to him, but what he did didn't work. Thinking of cargo as unwashed and other ways may have been how the SLF judged the captain, possible if he gave a little bit more concern for how others were feeling none of this would have happened.
Now the question is after this lady illegally vacated the aircraft, what seat in the court will the captain be sitting?