“Ok here goes... Where/When did California get SO Screwed Up, I mean what was the pivotal Event/Year?”
I blame Berkeley.
Yep
1965: When the University of California, Berkeley, administration capitulated to radical students. After that the flood of east coast radicals to California was incredible, and its been all downhill since.
Spot on!
The left was quietly simmering until 1964-65. It broke out with the likes of Mario Savio and the Free Speech Movement at Berkeley and quickly spread across the nation. It was significantly propelled by the Free Love movement, the hippy scene, the availability of drugs and the "Never Trust Anyone Under 30" mantra, all of which was tempting to the high school/college set.
If one today has difficulty discerning Savio's political inclinations the left at a minimum saw him at the time as a useful, effective idiot, if not an active operator. The FBI certainly understood he was well connected and gave him special attention.
Even after his death his memorial fund hosts speakers the likes of Tom Hayden, Howard Zinn, Angela Davis, Van Jones, Elizabeth Warren, and Robert Reich.
Subsequent events, many listed upthread, accelerated the swing.