If you remove politics from it, Americans are pretty good to each other. Also, if you remove the internet...Americans are pretty good to each other in real life situation. It's as soon as any politics is injected that a divide starts. From people saying the people in Ohio didn't deserve aid because they were a Trump heavy district, to people saying Hawaii never did anything for anyone (aka Republicans), so why care about their wildfire? I've seen that type of thing become increasingly more common. Politics has completely broken people's brains.
I wish people would just turn off the news. They sensationalize everything, from "Red state" poverty to "Blue state" crime. They know it gets clicks, so they play it up. The modern media model is broken and doesn't serve democracy or society. Couple that will grifters online hocking nonsense to rile people up and you end up with a lot of angry people that aren't really even sure what they are angry about.