The primary function of government is to secure the public safety. That's why people come together to form the social contract, to escape the "state of nature" and provide order out of anarchy. And when government fails in its most basic responsibilities, it falls to citizens to fend for themselves. And with California perhaps the state most unfriendly to gun rights, increasingly, those who stay safe are the ones who'll be able to afford their own protection.
Here's a report at CBS News:
And the San Francisco Chronicle reports on how bad it's gotten in Oakland. Funerals are so routine it takes the violent shooting death of 16-month-old baby for people to be shocked at the violence. That's how low it's become. See, "Tiny casket symbolizes new low for Oakland crime."
There's loads of reporting on racial crime problem (at Bloomberg, for example), but this Economist piece comes closest to explaining what's happening, "Oakland: Killing for respect."
And see the discussion at the New York Times, "Weekend Opinionator: Oakland’s Tragedy, and Black America’s."
Yes, the tragedy of BLACK America, which is not a tragedy of racism but a failure of both the leftist culture and politically correct Democrat black-privilege policies.