Both extremes on the political spectrum use and heavily rely on emotions over nuance/truth. Probably why both have been steadily growing and that the clashes tend to be explosive.
Political manipulation by Russia, China, etc, have been using wedge issues to push people into extreme sides on issues, but they throw support behind the far-right political parties, because conservative voters unite their votes and because they're more willing to accept mistruths.
Liberal voters don't unite well, and they also tend to have lower trust when it comes to misinformation.
How dare you. It is only the people that I disagree with that are unstable. I am a stable genius. I am furious.