this is whats wrong in this country - women don't know shit about the real world or human nature, but media and pop culture coddles these bitches and leads them to believe the world is one way, that humans are mostly reasonable, society really thrives and survives off of love good wishes and mutual respect, and all the "bad" things are aberrations or elements that can be corrected. violence built the society you exist in, and greed refined it... Pontificating on this man going too far when you have never been in a truly life threatening situation or had a real toe to toe fight since high school or earlier, means you don't know what you speak of, so shut the fuck up and pray that you will continue to be blessed/ lucky enough to never find out how far you can go.
The normal person cannot turn off fight or flight reaction- you don't stop until you believe that you are out of imminent danger - to my knowledge only psych/sociopaths can turn violence on and off. That man was scared, if he wasn't he wouldn't have been saying "stay down" -instead he would have been talking shit - his fear was justified, on the street if someone gets as aggressive as that chick does, they almost always think they have an ace, they're rolling deep, or got a gun, etc... they believe in an advantage that will allow them to punk you without personal repercussion. IMO he showed restraint at the counter and while beating the girls, if he had snapped, they would have more severe injuries or be dead -if you doubt this, research the injuries of victims where the assailant claims rage /snapping / blacking out....
Unfortunately he is a parolee, and he is black, so he will do time, his parole is violated, but with a good lawyer, the felonies charges will at least be pleaded down.