My opinion... the totality of the situation will be considered. Who can predict their behavior in an escalated situation? I know war vets, combat vets, LE both active and retired. Who can say how a person will respond if they feel their life is on the line? Whether "I" think it was or not, in my opinion, legally speaking, doesn't matter, nor does what "I" see in a video. In my opinion investigators and legal experts in this case will surely look at the totality of circumstances and also will seek to determine the answer to the question...what was the agents perception at the time?
They escalated the situation by pushing, pepper spraying and eventually killing.