It is the exact same principle. Deny overwhelming evidence of something based on nothing more than a baseless assertion that those claiming its existence have an agenda. See, e.g.
https://www.theatlantic.com/health/...rus-tell-us-about-conspiracy-theories/610894/
Also, anti-semitism and Covid-19 conspiracy theories are not exactly mutually exclusive.
Tel Aviv University think tank says libels blaming Jews and Israel for pandemic are spreading, as crisis sparks new iterations of old hatred
www.timesofisrael.com
***
www.haaretz.com
Alaska state representative Ben Carpenter told to ‘Keep your Holocaust jokes to yourself’ after objecting to virus screening
www.theguardian.com
Whether you’ve ignored overwhelming evidence to deny the Holocaust, that 180k have died of Covid, that man has walked on the moon, that vaccines don’t cause autism, that the Clintons didn’t run a child trafficking ring out of a pizza parlor, or any combination of the above, you’re still a nut job conspiracy theorist.