It looks like California has different views on Tax, Education, Religion, etc. Could California benefits by separating itself from the Union? or a terrible idea? who would really benefit from it?
Having not ever really looked into this, I cannot offer you much in the way of an answer. Sorry about that. What I can say is that as global capitalism's relentless instability and inequality worsen, all kinds of rising anxieties push people to rethink their situations, loyalties, etc. They question assumptions they took for granted. One of those is nationality. That can take the form of the rise of extreme nationalist political movements and parties (eg., Trump, Farage, LePen among many others) and/or kinds of nationalism built around units smaller than currently constituted nations such as Scotland, Catalonia, Macedonia, Quebec, and now California as well as Texas. These are signs of socio-economic decline.