Except its not, when you have been separated from your group, are alone, and part of the mob has threatened you and started a confrontation, you cant reasonably know the intent or mindset of more of that mob. To suggest otherwise is absolutely foolish.
To suggest that someone is capable of that level of hindsight while you have a big dude chasing your ass down after threatening to kill you is even more absurd to the point I think youre just trolling rather than holding this as a legitimate point of view.
He was separated from his group. That can change the dynamic of safety dramatically.
But heres a picture none the less.
At best, his option was to run through the "thin" section, but this is said with hindsight, not in the heat of the moment with some angry dude chasing you down after threatening to kill you.
This just demonstrates he had plenty of avenues to keep running.
I also still don't think the argument that anyone else around him was a possible threat to him is at all convincing - "I wasn't sure if the people ahead of me were going to be angry at me as well so i just decided to turn and shoot him".....?