I’m Japanese who’s lived in California for a few years, and I totally get the people who didn’t say anything back to the racist guy. Because people who say that kind of things are usually crazy and dangerous, you don’t wanna get involved and cause any fighting or harm to yourself and others. You can be sympathetic to the victims later but I think you should care about everyone’s safety first. Especially if you are a woman you can’t talk back to a crazy person who’s also big.