A lot of the anti-vaccine rhetoric is pushed for political reasons. Republicans want more people to die so they can blame Biden and have a talking point for the midterm election. If more people dead can get them more seats in Congress then they are all for it.
The problem with that logic is most of those dying now are either Republicans or non voters.
Yeah, but an extra 100,000 deaths (so let's assume 1/3 of them vote in the midterms, 80-20 Republican) could cost Republicans 20,000 of those votes, but the perception that Biden is doing a bad job at controlling COVID might flip more voters from Democrats to Republican.
Plus, it keeps Trump happy and not personally attacking the politicians and media personalities who might otherwise encourage vaccination.