At some point, if a person is supporting values that are antithetical to your culture, then you're going to ask them to leave. This may or may not be that time for Thiel.
Many of the immigrants who arrive to a western countries have antithetical cultural views. Do you find it appropriate to tell them to take a hike? Isn't it better to act as grown ups instead?
What I'm saying is that at some point, someone's behavior will become toxic to "your group" (not the whole US - here, the "tech community" however you want to define that) and then they get asked to leave.
This is actually the mature thing to do, to part ways, as opposed to escalating conflict where the same thing happens in the end but the participants are left bloodied and hurting after the in-fighting.
You have a problem with Theil? Don't take funding from him. Or if you're exceptionally aggrieved then don't engage with Paypal, Facebook, Tesla, SpaceX or any other companies he's had an instrumental effect on as an employee or investor. More rational would be to simply put your energy into positively supporting a candidate you do approve of.