This is an awful story that is getting almost no coverage. He was stabbed in an apparent robbery, and died after bystanders refused to help him.
A beautiful city has become a playground for criminals and insane people to prey on the law-abiding. San Francisco, until recent court decisions, was a city you could not get a permit to carry a pistol in. Respectable people in the Bay Area should obtain a pistol permit and learn how to use a gun.