I certainly agree with the sentiment of "fuck her" but the imagery you painted of "beating one to death" is really fucked up and reeks of some weird kind of overcompensation. Not helpful to the fight at all.
What "fight" ? It's clear she is has been getting away with this shit for a long time, this is one of those situations where someone needs to knock this fucker out because clearly she isn't going to learn on her own. My original post also said 'desire' instead of me going ahead and doing it and not because I give a shit about this racist ass person, but because I don't want to go to jail over this fuckface.
In hindsight this does seem all a little hyperbolic and masochistic but imagine being a minority and out with your family and someone comes up to you and says all this shits and acts this way, and there is no comeuppance. It makes me extremely fucking angry but again, not a violent a person so not sure how I would react in an actual situation.
I wish her nothing but the worst things in life.
Edit: The person we are arguing against is the same kind of person who would argue against punching nazis, just saying.