I also find the dogmatic pro-vax rhetoric occasionally dangerous, for example, the widely spread myth that vaccination has a 100% success rate or even close to it, which leads to people
ignoring symptoms - "My child can't have measles, we vaccinated
" - spoiler: your child CAN still get measles and while they will 999 out of 1000 times recover just fine if you live in a warm, dry home... you should be monitoring them for complications, and believing that it's "not possible" leads to complacency.