I think you'll find most "liberals" are pretty understanding that militant anti-vaxxers are delusional and misinformed. The issue is less with their delusion and more with the militancy of their delusion and the societal consequences.
If the militant anti-vaxxers instead of being anti-vax were just pro-drinking bleach then the danger of that delusion would be personal. Only idiots drinking bleach would be harmed.
What's happening though is the delusion of the militant anti-vaxxers is causing problems for everyone. They're breaking if they haven't broken hospital systems in many parts of the country, they're a breeding ground for new variants of the virus, and they're actively fighting mitigation measures to contain the spread of the virus in kids who can't be vaccinated.
People that have acted rationally and have socially distanced, worn masks, and gotten vaccinated are being negatively affected every day by delusional sociopaths. These same delusional sociopaths have made every aspect of the pandemic worse.
Why should anyone feel the need to keep coddling them? The militant anti-vaxxers are keeping the pandemic a pandemic, had they gotten fucking vaccines we could have COVID at least partially under control at endemic levels. Their words and actions advertise the fact they are sociopaths. Dealing with them is exhausting and unrewarding.
It's sad that positions on vaccines tracks so closely to political persuasion. At the same time if delusional sociopathy is part and parcel of a so-called political philosophy maybe that suggests a little self-reflection is needed for its proponents.
When we know vaccines still put people at risk why are we not locking everyone down and closing borders?
As far as I know, COVID isn't going to stop spreading around the rest of the world. So as soon as the lockdown in a given country ends, that country will be exposed to it and face the same pandemic they would have faced in the first place. Now, that makes a lot of sense to me if they are facing it with a new tool in hand (like the vaccine), that means a lot fewer people will die than if they'd gone through it with nothing.
But if there is no better treatment coming, what does locking down for 3 months, 6 months, or a year accomplish?