I don't disagree about name-calling, but the responsible thing to do is to adapt your opinions as new knowledge is revealed, not everyone is doing that.
Best way to convince someone is to make them think it was their idea all along.
At this point, I figure much of the anti vax crowd may be actively hoping something would go wrong here, due to the hate they are receiving.
Why does anti vax crowd look at things like Ivermectin etc which hasn't been tested at all compared to vaccines and could potentially have more unknown risks? Because it wasn't shoved down their throat and they were able to find it by themselves.
Even those who are in the middle, vaccine hesitant for example may be feeling the hate that is coming towards them, making them avoid vaccines altogether out of anger towards the other vaccinated side.
Who's calling them stupid? I don't recall any politicians or government health officials calling anyone stupid. Sure, there are people on Facebook/Twitter/etc... name-calling, but that's always been the case, and there's plenty of it on both sides.