The most amazing thing about this is that the decision was made by the 9th Circuit Court of Appeals. These are the most left-wing wing-nuts in the country.
On the negative side though, they're also the court with the most reversed decisions in the country. The question is does San Diego County really want to appeal? Because an appeal means going before the Supreme Court.
If SCOTUS rules to support the 9th 's decision, that opens up a whole can of worms for any jurisdiction that says "self defense" is not a legitimate reason to be issued a gun permit.
Interesting times people, interesting times.