That lower middle class includes many young couples with children who, if they're fortunate enough to own a starter home, are paying very high taxes for a home located not far from a slum, often with twenty illegal aliens living next door, and the local school is overburdened with kids of illegal aliens. If by chance they must take one of their kids to an emergency room, they should be prepared to wait for the hordes of illegal aliens using the facility to be treated, free.
This scenario is causing much resentment, because these young homeowners/taxpayers/citizens realize that they're the ones paying for the mess. The illegals sure aren't. Illegal aliens are sucking California's social services dry without a peep from the politicians.