Germs spread.
For some stupid reason -- much of which is the monetization of radicalized ideas on the internet -- people have decided to promote germs in the system, rather than inoculating against them. Eventually you get a pandemic.
A lot of people live online now, far more than they do in the physical world. And the internet's all people competing for attention. To get it, they have to put out crazier ideas than the next person, and that snowballs, until you have a bunch of people who are lost, rudderless, and looking for some kind of guidance and community, and all they're finding are crackpots who are spewing toxic bile because that's how they make a living now. They need to keep their audience miserable and angry so they'll keep hitting their YouTube vids and contributing to their Patreon and all that crap... and, eventually, you end up with shit like this. They want to make people crazy and sick because that's how they hook them into staying tuned. "The outside world is bad! Anybody who tells you that this stuff I'm telling you is wrong are just part of the conspiracy trying to confuse you!" Etc. etc.
It's all virulent swill, but in the name of "free speech" we absolve everyone of responsibility for anything they say. Doesn't matter if the stuff they're saying is of no worth, or is actually detrimental, they wanna just keep handing them bigger megaphones.
And then you have completely irresponsible pieces of shit like Trump as a leader of the free world, trying to normalize such viewpoints, all because he's such a weak headcase he can't reject flattery no matter who it comes from.
Expect more of it -- lots more of it -- before anyone really becomes willing to do anything to curb it.