after Trump nomination, o to -1, sorry Thiel, you are not welcome
You should also not assert yourself as a representative or gatekeeper of the community. It's this mindset that should not be welcome here.
Given some of Thiel's views and statements on politics (and without necessarily making a value judgment on those views), I'd honestly put more money on his just wanting to hurt the functioning and credibility of the US government as much as possible by seeing Trump elected.
At least one source[1] reports it as: "'Peter has become an increasing admirer of Trump's public attacks on political correctness, especially what he has been saying about women,' says a close friend of Thiel...."
[1]https://heatst.com/politics/the-real-reasons-peter-thiel-has...
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.