I know Los Angeles has threatened to boycott Arizona. Aside from all sorts of Constitutional implications if a government entity in one state boycotts another state, I have a simple proposal: Boycott Los Angeles. Don’t visit it; don’t go to the movies; and don’t buy products on TV shows emanating from Los Angeles. Let the marketplace decide.
Same thing for San Francisco. Don’t visit this tourist destination.
In both cities, I think the business community would move very quickly against the local government if American outrage started damaging already damaged bottom lines. (Both San Francisco and Los Angeles, cities that have been under Democratic governance for decades, are broke.)