Boston has a higher murder rate and overall violent crime rate than San Francisco, as do most large cities. San Francisco's problem is rampant property crime:

Boston has a higher murder rate and overall violent crime rate than San Francisco, as do most large cities. San Francisco's problem is rampant property crime: Property crime is still real crime and harms people mentally... but it also means SF is physically safer than many cities that have less overall crime rates, because of their higher violent crime rates. Since it's often beneficial to an agenda to conflate the two so you'll always see something like: "San Franciscans face about a 1-in-16 chance each year of being a victim of property or violent crime" (https://www.hoover.org/research/why-san-francisco-nearly-most-crime-ridden-city-us https://www.hoover.org/research/why-san-francisco-nearly-mos...)