I maybe did not read all of it, but which missinformation is he spreading exactly?
(Follow up, why are you in a position to judge that? )
As for missinformation in general, I happened to be born after chernobyl. Where the authorities in eastern germany said, all is fine. But since the people got western television, where they said no, not fine, children may not go outside while the radioactive raincloud is still there, my immediate experience is rather people downplaying the dangers.