It isn't insane that some people are against vaccine mandates.
It is insane that some people believe what they do about the vaccine: That it's a ploy to decimate the population, that it contains baby parts and poison, or microchips, that it is a test run for the mark of the beast.
That is absolutely batshit insane.
The only difference is the level at which people attempt to integrate the philosophy into their life -- I'm sure there is someone out there who has been impacted more by Terry Pratchett novels than the religion they were brought up as, and using either of those in the way the instigating poster did would be silly.
If you have evidence of people being unable to buy or sell goods without a vaccine passport, please share.
Oh, and do recall that the context from Revelation is that a person was completely excluded from the economy, not that they lost some privileges, so please don't waste time with false equivalences.
Although, honestly, it's probably a waste of time anyway: I just don't live in the same fantasy dimension as these people and their arguments hold no water to me.