Do you really think that they would allow this now? I believe there would be SWAT teams sent to take out the Korean grocers today.If past behavior is the best predictor of future behavior, I have to disagree:
In the L.A. riots, police withdrew and left the citizens to their own devices.
In Baltimore, police withdrew and left the citizens to their own devices.
Im Ferguson, police withdrew and left the citizens to their own devices.
What indication do we have things would be different now?
Because no one was using guns to defend themselves in Baltimore or Ferguson. If citizens started using guns to defend their property I guarantee the mayor of Baltimore would have ordered SWAT teams out.
Look at what happened in New Orleans after Katrina. Looting was allowed and the citizens were disarmed.
There is no way the majority of big city govt's are going to let citizens defend their property with force.