The process started with demonizing them to the point of being singled out and blamed for how the disease is impacting society. When the discrimination started, there were very few willing to speak for them. Particularly malicious was the expansion of the term anti-vaxxer typically used for a fringe minority which “rejects all vaccines for everyone” to all of those that “reject one single vaccine for themselves”.
Now a measure that will come too late and impact the entirety of society is sold as a means of finally forcing them to conform.
From the outside, this may look like a perfectly executed propaganda campaign. One can’t exclude that the government (like the Canadian gov which actually got caught I believe) took advantage of the chaos and flexed its propaganda muscles a bit. But the more scary possibility is that a frightened and manipulated population + incompetent government in CYA mode is enough to try to override the constitutional principle of bodily integrity.
And it’s precisely this principle which seems to be the last thing preventing the state from forcing or punishing the unvaccinated too hard, limiting them to a fine.