Hate the thought of this being a hoax! but.....
having grown up in a rough City, when someone is slicing you with a knife, it doesn’t turn out looking like a red raspberry in a photo! She clearly didn’t want to cause herself any pain creating this red rash of a B!
I apologize for being skeptical because we have no way of knowing, however if the attacker’s comments are verbatim I found them a bit too polite: Oh, you are a McCain supporter, I am goint to teach you a lesson. As opposed to “F ing McCain B——, come here B-—— F you”