Mocking antivaxxers is not punching down when their decisions and actions are literally murdering people.
Antivaxxers are participating in a systemic genocide of marginalized people, the working class, and the immuno-compromised.
In a perfect world, these ideas wouldn't have spread to begin with. In a still better world than we have right now, we'd have mass re-education programs.
Instead we have a global pandemic made worse by a murder cult.
I had to get my own vaccinations for regular shit after I turned 18. Antivaxx shit predates its modern incarnation and there's a bit more to it than I think a lot of younger people understand. Jenny McCarthy didn't start this shit.