Earlier quoted context omitted.
No, it hasn't. The rule has been the same for years: most politics are off topic. Check it out: https://news.ycombinator.com/newsguidelines.html . The difference between "most" and "all" is significant. HN can't be immune to what's going on in the outside world and we've learned from years of experience that it doesn't make sense to try. At the same time, we're not going to let politics overwhelm the site, since that…
I wish I had the time to gather the data. Someone please do this. Make sure to normalize against total activity. I'm a hn user since at least 9.8 years ago (my first HN handle was different than current, which is 7 years old). To my impression as a relatively apolitical person, the site has become MUCH more political in the past year. I may be wrong in that though.
It's an election year.
Some of the policies and statements on display are extremely divisive.
Divisiveness breeds discontent at all levels, discussion, intimidation, outright violence.