I think it’s more of a hard shift to the left, I lived in the San Francisco Bay Area for a few years (2010 to roughly 2015) and knew lots of people that are as crazy as the left seems today. These were people that went to Berkeley or Stanford, were taught that America is the enemy and that Marxist policies were the only savior. Seriously, I worked with people who wished the government would takeover the means of production! These people were everything the left is today, the difference was that most democrats were more moderate. Now they all seem unhinged.  Conservatives in the Bay Area and most of California know to keep their mouth shut or face violence and hatred. I’m glad to be in a more conservative area now...just bought a MAGA hat this week :D