In a "normal" election, this would be pretty cut-and-dry: it'd primarily be a political disagreement over taxes or something, and letting someone go because of their political beliefs would be viewed by many as being pretty extreme.
Many people — myself included — view support for Trump today as an ethical problem. When you see him and his followers advocating misogyny, racism, xenophobia, homophobia, aggressiveness, and basically all the other -isms and -obias, it becomes much harder to "see the other side" of the debate. It's not political for many people who will see — and have seen throughout this election cycle — very real repercussions in terms of discrimination and hostility that affects them every day in their lives.
So yeah, there's a lot of anger with YC supporting someone in a leadership position here. I know YC keeps mentioning that Thiel is in a part time position, but he's still in an advisory position, which brings with it a lot of responsibility and ownership that we'd hope YC would be much more understanding about the impact of such a position.
I appreciate that it's a tricky situation for Sam and others to be in, but I do hope that they'd reconsider their stance in the future. Until then, on a personal level, I'm not interested in applying to Y Combinator. That's one small thing that I can do in the meantime, at least.