“While all of us believe in the ideas of free speech and open platforms, we draw a line here. We agree that people shouldn’t be fired for their political views, but…”
Make up your mind. Either you believe in the ideas of free speech, or you don’t. Either you agree that people shouldn’t be fired for their political views, or you don’t. This post says you don’t. Which is perfectly fine, just don’t say you do.
Whatever happened to “I Disapprove of What You Say, But I Will Defend to the Death Your Right to Say It”?
Of course you are free to end your association with YC if you strongly disagree with them. And they are free to continue their association with Thiel.