(b) Pretty sure Thiel isn't going to shut up no matter what Sam Altman does.
(c) Pretty sure political criticism doesn't mean "the kinds of criticism I am comfortable hearing" --- in fact, pretty sure John Stuart Mill specifically warns against using discomfort as a litmus test for criticism.
(d) Pretty sure Thiel did more than simply donate to Donald Trump.
(e) Pretty sure the declaration that YC is a "non-political organization" is one you made, not one that YC did, and further pretty sure that nobody at YC agrees that their actions are cabined by your (so-far-unstated) definition of what a "non-political organization" is.
(f) Pretty sure YC has already threatened to blacklist organizations that disagree with them politically.
Oh, I could go on, and on, and on. But do we really need to?