I don't get why this was ever even considered a conspiracy theory. In EU you had to (and probably still have to) get a test confirming you didn't have covid to be able to travel to other countries. So we already had a "covid passport". Only makes sense the concept would evolve to where you can replace the test result with a confirmation of vaccination.
I think the measure is a good compromise between completely locking the borders when a pandemic happens so that the infected don't come to your country, and not taking any measures at all to prevent the infection being carried into your country.
You still take some action so that foreign carriers don't bring shit into your country, but people are still allowed to legally travel.
mask wearing != lockdowns
In your "Your compromise will see in chains before long." you put "War the mask." at the start of a list that's supposed to highlight the road to "chainhood". Which is ridiculous.
And I find it hilarious that covid "skeptics" like you complain about a restraint on freedom of international movement, when the same demographic usually complains about illegal immigrants.
Just FYI, when traveling to more "exotic" parts of the world, you're also required to take certain vaccines before you're allowed there. There's nothing coercive about this measure. It's been standard practice for decades already. Let me know when you'll start complaining that you're forced into taking yellow fever vaccine.
Mainly gaming/nerd instance for people who value free speech. Everyone is welcome.