Black people:
* are in denial about just how much these white people don't care. Everyone seems to think the mentality that could lynch someone, and invite their kids to see it. Or tie black kids and babies to stumps to attract alligators (term gator bait). That would knowingly sentence the wrong black man to appease a crime they knew had to be white, ended right after the civil rights act was signed. Those same exact people were the same after the civil rights act and culturally passed down the sentiment that ANY act against ANY black person be they man, ,woman, child is completely acceptable.
* we don't have a plan. Generally. The sista said "I've been waiting to meet one of these Karens'. So she has thought about it but I wouldn't be arguing with her like that.
Anyway, generally, we think we can possibly skate by in life and with some caution and luck avoid the public outburst of some Karen or Brad or race soldier cop. So, we don't plan and in the moment we don't know how to keep calm and work the plan but instead 'why come you be doing that mayne', etc.
* make practicing white supremacy have consequences. I'd ask a lawyer to see the video and ask is there anything I can do in civil or criminal court? Even if you don't win, the fact that she is dragged into court and her actions are now part of the public record is enough. That record is forever and if she does that again, the next black person/family has a stronger case to sue for money since she has a history of harassment.