It’s not just Californians. NAFTA saw thousnds of manufacturing jobs leave the US, and our politicians said it was good for America!
And the politicians in the European capitols said the European Union would be good for them.
Even the Swiss politicos and business leaders were pushing the country to join the EU for fear of being isolated from their biggest trading partners, but the people voted it down in a national referendum. I suspect the Swiss feel they made the right decision.
Sweden and Norway rejected it too. But they were thinking about joining.
There is no way they will join it now.