Because they have ideas largely based on fiction and rumors, far-right people absolutely loathe fact checkers.
Usually the responses to them are very primitive, but I just read a lengthy article that is absolutely incredible in its delusion.
Here's a reactionary Catholic writer trying to say that Democrats actually have more of a problem with believing disinformation. It's like stepping into an alternate universe https://thespectator.com/topic/rise-blueanon-conspiracy-theories/