American here.

First, you’re right. About basically all of what you said above.

I think you particularly hit the nail on the head with this:

I’m always thinking “dude, you need to chill” cause literally no one is attacking them and they’re fully secure. But it seems like they’re always searching for a fight or something.

The media here, funded by the big corporations, manufacture tons of FUD (“fear, uncertainty, and doubt.”) Things to be scared of. “They’re putting chemicals in the water that’s turning the frogs” (and by extension, your kids) “gay.” “The ‘woke mafia’ is trying to convert your kids to atheism.” “The Democrats are going to take your guns so they can install a totalitarian one world government without any resistance.” Most of it’s not true at all. Some has a nugget of truth but it’s not actually any threat.

I will say the Republicans are worse about this than the Democrats (the Democrats’ concerns are more legitimate than the Republicans’), but the Democrats are far from immune. Both are living in fantasy worlds.

…until something very bad happens like the second civil war…

Indeed there’s plenty of rhetoric out there pushing the idea that the U.S. is in a civil war. Between the woke antifa (short for “antifascist”) and the fascist conspiracy theorists.