It's a "free world", "free speech", "free choice" , and all of that; but if a foreign country demands you have the vaccine before you enter; if an airline demands you have the vaccine before you fly; if a pub or restaurant demand you have the vaccine......well, that's THEIR free choice !
Then you make YOUR choice, wether to travel abroad, eat out, go to a pub.
If enough say NO, then things will change.
If enough aquience, .......well, then wer'e f****d !
Cheers.