Most of Silicon Valley is "progressive liberal", when in public, but they are some of the biggest snobs in the world. Once you obtain the wealth/power they have, it changes you. They are just worried, that a president like Trump may actually try to do some of the things he says he will do. Granted, I don't think he will have a LOT of luck bringing manufacturing back to this country, I'd like to see it happen, but, the reality is, the world changed since the 50's. Blue collar factory jobs, went overseas for profit. If they brought some/all of them back, your prices at any retail place would go through the roof, or, china would just make knock offs of everything. I think what they are more worried about is losing the control they have over politicians, and having to figure out even more creative ways to hide their money overseas to escape the tax problem in THIS country.
If they would just eliminate the corporate tax rate, there would be so many corporations wanting to move their headquarters TO the USA, as a tax haven from their own countries, banks would be full of money to loan and get the economic engine running again. Corporations don't pay taxes anyway, they pass it along to consumers.