As many have said, it seems social media allowed the crazy to breed more crazy. Crazy by itself in rural America was isolated to pockets. Then they got online. And instead of using the internet to learn they used it to reinforce. And the addictive qualities of social media causes them to want likes. I'm not immune. I enjoy it when someone 'likes' one of my posts here. It is a form of validation. I make sure to 'validate' others. But while we have our crazies here, I don't view it as intense and full of stupid as the twitterverse an facebook.
Lately I have noticed that the hermancainawards and others tend to also have a lot of religious fundamentalism in their memes. Lots of 'prayer warrior' requests. I don't mean to offend the religious, but I do think quite often the belief in God holds us all back. I know there are very intelligent Christians posting here who I often agree with outside of the topic of religion. It seems though that the Venn diagram of vocal anti-vaxxer and whacked evangelicals overlaps pretty often. I have a sister who belongs in that diagram. The entire family thinks she got Covid a while back, but of course she wouldn't test. Roulette wheel seems to have worked out in her favor. This time. But the toxicity of evangelicals and social media honestly to me can't be overstated.
I don't know what you do about it, but I know this problem doesn't go away, even if we manage as a race to overcome Covid.