I was thinking about it from the perspective of changing people’s minds.
With right wing conspiracy movements, are they really converting anyone or just organising people who already lean in that direction and just need a rallying flag.
To go off on a tangent, I think a lot of people believe in conspiracy theories because they choose to. To quote Alan Moore,
“The main thing that I learned about conspiracy theory is that conspiracy theorists actually believe in a conspiracy because that is more comforting. The truth of the world is that it is chaotic. The truth is, that it is not the Jewish banking conspiracy or the grey aliens or the 12 foot reptiloids from another dimension that are in control. The truth is more frightening, nobody is in control. The world is rudderless.”
I think we all do that to some extent, e.g. in relationships; see “positive illusions”.