The Left believes that holding a view counter to their view is the same as a physical assault. Therefore, by filming herself berating this poor woman, she becomes, in her own eyes, a hero. For the Left, this is the same as a soldier charging across no man’s land and taking an enemy trench. She’s expecting a lot of online love and perhaps someone will give her the medal she so obviously deserves.
I actually think you summed it up quite well.
The left believes they can kill you if you get in their way with a different viewpoint.