A "collective right" is an oxymoron and is just about as constitutional as another famous oxymoron, "separate but equal". Both of them are bogus legal concepts.
The 2nd. Amendment is a poor step child to the Left, if not a complete b*st*rd. They would repeal it in a NY minute, if it wasn't part of the sacred "Bill of Rights". They know that once any right is removed from these first ten that the rest will soon fall. That's why the Left tries its best at malignant neglect and abuse to the rights that it doesn't like.
As far as I am concerned, the state of California has no "right" to a militia.
Be that as it may, that's how the Ninth has ruled and the US Supreme Court didn't see fit to reverse them as usual.
The RKBA amendment initiative is one of the last chances California has left to reclaim the right to armed self-defense which has been steadily stripped away by politicians, judges, and bureaucrats.