But you're just focusing on politics. We have people attacking doctors. It's one thing to say "I think a vaccine was rushed and I don't trust pharmaceutical companies." It's another thing to say--without evidence--"doctors are all on the take from pharmaceutical companies, that's why they're pushing vaccines." That's a lack of trust in people and institutions without much reason for it.
I think political polarization produces a ton of angry people. That anger spills over into arenas not traditionally so deeply impacted by politics.
I guess that's in part due to the internet.
But again, w/respect to lack of trust in people like doctors, or lack of trust in institutions. It's US political polarization that can be leveraged to attack Americans. North Korea, for example, is unable to defeat the US economically or militarily. So what can they do? Convincing Americans to avoid vaccines that can keep them alive, or convincing them to distrust the FBI/CIA/NSA... that's one of the very few attack vectors available to them.
There's no such thing as a perfect human organization. No such thing as the perfect vaccine with zero side-effects. A healthy US culture recognizes that fact and doesn't attack itself over it.
But an unhealthy, deeply polarized US culture can be easily manipulated, right? Both sides are primed to believe anything that can be used to paint their political/ideological opposition in a negative light. Facts be damned. It's child's play to find some disaffected nutjob doctors or to cherry pick a few research studies on side-effects that haven't even been peer-reviewed yet, and seed social media with posts about how this "evidence" proves this, that or the other thing. Create a few new "news" websites and contribute some articles all about it. Next thing you know, you've got a massive us vs them narrative cooking.
Meanwhile, over on the other side, push fear-mongering articles and posts about people dying from COVID. Scare the living piss out of as many people as you can. Seed social media with posts about how awful people who won't wear masks are. Etc. And now you've got some nice us vs them narrative cooking there, too.
Can't invade America. But can sure get Americans at each other's throats. Can produce gridlock in DC. Can manipulate Americans into always electing a president from the opposite party from whomever the current president is. Keep shifting congress around so as to prevent any hope of the US engaging in long term planning and policies in geopolitics.
Easiest thing ever to do. And it's working.