I remember a couple of years ago the guy that came to the Bay Area for the google interview and stopped in to see someone in Oakland the night before and was shot dead. Or, the old man that was killed by someone on the street hitting him so hard. Or, the kid that was paralyzed while getting a music lesson because some shot off a gun during a robbery.
In the past, the crime in the bad areas of Oakland didn't bleed out to the nicer areas. I predicted this after the 2008 crash. I knew once the economy crashed, it wouldn't take long for the very large numbers of uneducated, jobless, young men in the bad parts of Oakland to realize their meal ticket was walking around in the nicer areas of town. Piedmont, surrounded on all sides by Oakland, has been hit by an increase in robberies, many of which are home invasion style. I was talking with a friend the other day who knows a lawyer that is defending some of the people in the gang (Easy Money Team... what a name, but it gives you insight into their thinking). They're all 14-20ish, with parents about 14 yrs or so older than them.
There is a lack of opportunity, but the black community needs to address some of their problems, at least one of which is cultural: it is uncool for kids to succeed through academics, it is very cool for kids to succeed via sports or rap music or dancing. Until it is cool to do well in school, and that starts with the parents, this problem will only get worse.
For those that want to label me a racist: there are studies that back up what I said. There was a prominent researcher that died recently, but not before writing a scathing article about this problem. There was an article about him and his research in the East Bay Express. I forget his name. It was eye opening.