You are also EXPECTED to have a binary opinion on all these issues with no room for differing opinions.
Look at the NFL protests during the anthem. Kneel and you are a bleeding heart liberal that hates the cops. Stand and you are a red hat conservative promoting police brutality and the Private Prison Complex.
Every day there's a new outrage that somehow splits up the community down party lines.
https://www.theguardian.com/world/2010/oct/13/tea-party-bill...
I've overheard a few conversations of my coworkers (yes, anecdote) about the whole Kavanaugh debate and pretty much every one of them was pretty common sense (e.g. not sure if I believe her, but Kavanugh certainly sounds like he isn't an angel).
TV and visual information mediums are very effective at promoting emotions, but make it very difficult to convey rational arguments and thoughts. Notice how easily you can be distracted by the appearance of the messenger and not pay attention to the message itself.
There is a very good book on this called "Amusing ourselves to death", by Neil Postman. He wrote this in 1985 and he was far ahead of his time.
Here's a great interactive explanation of how this works: https://ncase.itch.io/wbwwb
To speak even more generally, humans make tools that amplify our impact. Some of those tools make us better at being terrible, some make us better at being clever, some do both.
Nobody is saying this
It takes a mass tragedy to unite people. Look at what happened to GWB's approval after 9/11!
I worry it will take another war or mass terror attack to get us out of this divide we are in.
If only I were Ozymandias planning a fake Alien attack on New York to bring everyone together...
https://www.washingtonpost.com/news/wonk/wp/2015/04/23/a-stu...
Robert Bork, the man Nixon promised a Supreme Court seat to for assisting with the Saturday Night Massacre, was fairly close to making it to the supreme court. He blamed "ultraliberals, radicals and leftists" and their dangerous tactics for his vote failing. Hardly unthinkable.
As for civility, you can argue that but in my mind that civility ended with the candidacy of Trump. I hold the belief that civility is overrated though, I would much rather have them be honest than civil.
A prime example is that the US is on the verge of confirming a man on to the supposedly apolitical Supreme Court that says under oath that his political opponents have created a vast conspiracy to bring him personally down. If that man is telling the truth, that is an awful moment in political history. If that man is lying, that is an awful moment in political history. It doesn't matter which side of that issue you are on, but something is happening here that would be unthinkable a couple decades ago.