It’s been a three-pronged attack actually.
1) Mass immigration
2) Californication
3) Massive brainwashing indoctrination of students
You left out one: the left’s takeover of the judiciary. Can’t win at the ballot box, or legislatively? Go find a federal judge who supports your position, and set policy from the bench.
Thankfully, Trump can do something about the judiciary, but the Dims will do everything they can to stonewall his appointments to the federal bench over the next two years.