Please, the questions are ridiculous, the "liberal" ones are ridiculously mild, whereas the Conservative ones are borderline insane; a) trans ppl are cray-cray (refuted by science), b) country wide abortion ban and thus a ban on bodily autonomy (so much for personal-freedoms)
We also know that what one expresses, and what one does are two different things.
Expressing you'd be okay with someone expressing things that go against your beliefs doesn't mean you actually support them. E.g analogous to claiming you have a free-speech focused social media website, let's call it pravda.social, and at the same time you ban criticism of topic. (s/pravda/truth, s/topic/abortion).
Whether or not you agree with the survey questions or response or with Nate's analysis of them, that is the conclusion that he drew from the data and he doesn't need a citation to state his conclusion.
If I say "There are three people in the room. I opened the door and saw three people" you don't say I need a citation to state my conclusion that "There are three people in the room", I have already explained how I arrived that that conclusion.
This article was Nate’s examination of data which (in his analysis) resulted in this idea. The article is literally the “citation”.