I too agree.
I’m inclined to blame the one who escalated the cuss-fest into a physical fight, to be the guilty party. In this case, it was clearly the old man who physically assaulted the younger one.
You're sure of that? How do you know that the old guy wasn't just going off to find some security folks and, as he tried to get by the young jerk, the young jerk didn't knee him or otherwise cause the old guy to lose his balance?
ML/NJ