Part of the problem is that people are reluctant to discuss the genuine risks of vaccines.
When my twins were born I was young, and my ex was absolutely adamant he didn't want them to have the MMR. Anytime I tried to research it you could either find "It's 100% safe" or "It's going to give your kids autism". Trying to find anything in the middle was difficult, especially when ex's niece did react very, very badly to a vaccination.
Mine had single vaccines in the end, which I now bitterly regret. A very kindly friend, who realised I was an unconfident parent surrounded by very loud, opinionated people, gave me the actual stats on how many children react badly to vaccinations.
It meant that when it came to my next child I happily allowed them the vaccinations because I'd seen actual facts about the statistics that acknowledged that some, a very very small number, children do react badly, but a considerably larger number don't.
Just shouting at people and calling them stupid doesn't do anything except make them feel defensive. When you are surrounded by people harping on about the dangers it's not helpful to say there are none. Better to educate people on the actual statistics than justyell at them.