I watched the video live as it was going on and the whole time was thinking that if it were black people the cops would have opened fire.
Not saying they should have opened fire on these people, just that it was different.
As for this woman, she thought she could get away with whatever she wanted. The reinforced door was locked and barricaded and she was ordered to desist/standdown/stop/etc/etc several times with the gun drawn on her and she continued.
Not saying she deserved it, but if you grab a fork and shove it in the electrical socket, your gonna find out.