They read it on the internet.
... it must be true.
Many people will believe what they want to believe. It’s human nature. Even dedicated scientists have to examine themselves for confirmation bias in order to avoid it as best they can.
Noack claimed the itty bitty razor blades will kill everyone who got vaccinated. That’s one huge pile of bodies. I guess those who believe him shorted insurance stocks and bought funeral industry stocks. If Noack was right, they’ll get rich. We’ll see, I suppose.