Here in Balkans too many people unironically believe that planes fart some smoke poison or whatever from contrails to make new diseases which is why there are supposed new viruses in Balkans and whatnot. Supposed ''proof'' for this are some random scientists and labs in Croatia, Hungary and Poland which ''studied'' these chemicals...
They won't shut up about it, what the hell are they talking about and how to put an end to this bullshit? This population went insane I swear...
to complement your point, all conspiracy theories are antisemitic in origin.
all these nonsense of secret group that runs the world is the international jew. after the defeated of facism being openly antisemitic was not good, so they got rebranded as time went on.
not surprising all believer and groups formed around then are far right, like qanon