It’s not specifically about that, but I still see where they’re coming from. When you keep talking to conspiracy theorists they always bring up the Jews eventually. This means that a lot of conspiracy theories that don’t explicitly have anything specific to do with Jews (like 9/11 being faked, to name an example) to still be strongly tied to antisemitism.
You can mount the complete backup as a local file system, which I think would suit your needs. I’m not familiar with their various integrations either, I just backup over SFTP.
But to reassure you, I also needed a bit of trial and error with Kopia, as it’s not the easiest GUI ever to get used to. But I’ve got it running now, and I’m very happy with it. I’ve also used it to successfully restore multiple backups (to test if it worked) and they all worked.