Great moral courage there.
YC has a choice: do what IBM did in the 1930's or not.
https://en.wikipedia.org/wiki/IBM_and_the_Holocaust
And before you say I'm "going Godwin," remember: It was Sam and Paul who've said they think Trump is a threat of similar proportions. If Sam really thinks that, the moral thing to do is cut ties.
And yes, it'll be hard. Would have been easier to do before the election. It will only get harder.