All we need to see is some more details, preferably from reputable local news sources instead of some obscure news feed with an agenda. Until then it's all speculation, more than likely completely out of context and quite possibly total bullshit.
No outrage here. You need to figure out when people are laughing at you vs. when they are angry with you.
How should they have responded? Should they have shot him on sight? If he was truly private security, then he had coordinated with the cops already. They were aware of his presence long before they encountered him. That's how it works. They'll get a call over comms that states "licensed contractor in vicinity with firearm in the open." Then when they see him they go "oh, there he is." Unless he is doing something illegal, they won't do anything about him.
Poor lil' Antifa chic not used to confrontation. At home she gets to shriek and scream and her parents let her. Welcome to mace.
This one is a riot (booooo....) Throw stuff at man's car, but when man comes out enraged, scream for police. hahaha.....
And the last one for now in your Daily Antifa Idiot Stream. Protester taunts K9, gets bit in the ass. This shit makes my day.