Not just taxes, but just as much a factor is how they view the Second Amendment. Every gun owner in California knows that they have ZERO protection from their state government when it comes to keeping their firearms, and all that is needed for them to lose everything and be at the mercy of MS-13 are Democrat-dominated federal courts.
[which we would have if the NeverTrumpers had their way in 2016, and which is also why I still have a big problem forgiving Ted Cruz for his flirtation with that bunch for as long as he did]
And Mark Levin