Why? Some of them will have been lied to by people who have considerable amounts of money to spend on disinformation, and we (who support vaccination) have done a poor job of explaining that vaccination is safe and effective.
https://www.theguardian.com/technology/2019/nov/13/majority-...
https://khn.org/morning-breakout/important-donor-to-anti-vax...
We know that many people struggle to understand health information. In England we see:
https://beta.nhs.uk/service-manual/content/health-literacy
> More than 4 in 10 adults struggle with health content for the public and more than 6 in 10 adults struggle with health content that includes numbers and statistics.
Attacking people with anti-vaccination views does not work to change their minds.