That's probably my age but never the less.... I never thought of the Raiders being an "LA" team. Of course I don't live in LA... never have, never will... so I can't speak for the denizens but I never got the Raiders = LA thing when visiting, at games, never.
Sat by a few Raider fans at games in LA... not one of them was from LA...all the central valley or Bay area. Always came off to me like the Raiders in LA were invaders... not indigenous. But that's my experience and no doubt very off base. - JamesJM