When talking to a white person who lives in San Francisco, it is best not to bring up New York City. Though they live in a world class city, San Franciscans have a crippling inferiority complex about New York and even hinting at that will make them very sad or very defensive.
Fortunately, there is a fool-proof method for quickly returning the conversation to a positive, trust-building tone. No matter how much you have offended someone from San Francisco, you can always make them feel better by asking them how they feel about Southern California. They will instantly talk of how it is filled with crime, pollution, hegemonic culture, and the wrong kind of white people: “I swear California is like two separate countries, and I am so thankful that I live in the cultural center of the West Coast.” This will allow them to reassert their superiority and leave the conversation with a positive feeling about themselves and about you.