Well, there are some issues, Elections have been increasingly 'violent' in every election in the last 40ish years.
https://www.the-american-interest.c...r-of-electoral-violence-in-the-united-states/
https://www.economist.com/united-st...ican-cities-reflects-the-fury-of-polarisation
The real issue at hand is the radicalization of people and how much that is spurned on by big tech and the media. When people are radicalized they get more violent, I'd say that is basically historical fact, but I'm sure it could be argued.
You say the right-wing media sensationalized it, and yes that's probably true, but the left-wing media does its fair share of under or over sensationalization on things based on their views too.
The Overton window is very slanted to the left-right now and everything becomes a political issue for them to polarize people with. Which is why basically all classical liberals get called, 'far-right', 'alt-right', etc because they're not left enough for the modern-day left. You go against the narrative of either political party on anything and they label you an 'extremist' for the other side. I've heard Tim Pool talk about in one 24 hour news cycle he was called an extreme leftist and far-right over his opinion on the same subject, and I've seen that happen with other journalist types too.
Also doxxing has become a huge issue, so it might not be s2'ers doing it but it's become a very real thing for people to get gunned down and hunted based solely on their political, or world views.
If you're looking for what the poll itself proves, it's that the radicalization of people has gotten the US into an extremely volatile, dangerous place, and that people are bracing for and expecting violence around the election, because of being groomed by their echo chambers, and media sources that feed into their preconceived notions about anyone who dares disagree with them on anything.