What I don't understand is why she wanted the cops to come. I would think they would be much more likely to haul her away for disturbing the peace or some such, unless wearing a MAGA hat is illegal in Palo Alto/California
The right thing to do would have been for Starbucks to call the police and levy the complaint so the woman's threat to obtain the man's personal data would be moot
"She told him she wanted him to call the police because then she would learn his name and where he lived, his wife's name and where his children had attended school, her Facebook post states."
She thought she was in the right. She lives in a bubble where Trump is a racist and anyone who doesn't think Trump is a racist is a racist. They're conditioned to think that the MAGA hat is a racist symbol. She's confronting a literal Nazi here from her perspective. I doubt it occurred to her that she did anything she should be arrested for.