The answer to your question goes like this: (1) some stories with political overlap are on topic (see https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so... (2) we try to be careful about which those are, so the site doesn't go down in flames; (3) I think it follows from HN's core principle (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...) that we have to allow at least some discussion of this topic—to suppress it altogether would contradict the intended spirit of HN; and (4) I've explained (or tried to) the sense in which this particular story can be on topic for HN, in my other comments in this thread.
If you or anyone reads that material and still have a question that isn't answered there, I can take a crack at it. Just please understand that the answer may or may not be satisfying, because even if we agree on the principles, different people interpret and draw the lines differently. The important thing for HN moderation is the principles, though, not the individual calls.