I think a lot of what we're seeing right now with all of these crazy (and they are crazy) conspiracy nuts becoming so aggressive and outspoken is that with Trump's rise to power and the way the GOP is going these people feel empowered for the first time ever. For decades all of these conspiracy theorists had properly been relegated to the fringes of society, and often mocked, like the whole John Bircher "putting fluoride in city water is a commie plot to render red-blooded American men sterile" conspiracy theory that was ridiculed in Dr. Strangelove.
But with Trump's rise these people now feel like they're suddenly in the "mainstream" and are riding high and so they're aggressively promoting and pushing all of their wacko conspiracy theories like never before, including even ones that most Trumpers don't subscribe to, like the Flat Earth nonsense. This is a golden age if you're a formerly fringe conspiracy theorist. The actual science and data and facts to support these conspiracy theories hasn't changed, and they're still wacko and utterly unsupported by science and/or medicine, but as we've all seen that doesn't seem to matter anymore in our government or society. You can believe whatever you want to believe and create your own reality.