There are crazy things that people believe (not necessarily vaccines turning people into the Hulk, but still) that, in the past, I would have assumed were mental health issues.

But when massive numbers of people believe these things, blaming it on individual problems is not so productive. About 300 people a day are dying because intense political polarization has caused people to believe whatever best feeds their tribal urges. The same thing caused an attack on the US seat of government, and a very large percentage of the population thinks that's ok.

I don't know the solution, short of us declaring that the internet and cable tv was a bad idea and we need to go back to simpler times of unconnected computers and 3 TV networks. But I'd agree that facebook, Twitter, etc has to do something.