You are free to not be vaccinated, but please piss off somewhere that you cant endanger society.
It's questionable not vaccinating your kids, because competent scientific evidence shows that they are an order of magnitude safer than the risk of the diseases they are protecting agianst. When you frame it like that, non-vaccination is negligence and we legislate against other forms of child negligence.
Finally, no-one has ever said vaccines are 101% safe. There are risks and vaccine injury is real, but rare. We accept this risk because it is statistically far better off for society, and we have set up support programs for the occasional individual who suffers a serious adverse reaction.
Finally, reality shows strong evidence in support of the general safety of vaccines. Anyone who tells you otherwise is completely full of shit, and is most likely part of an over-privileged echo chamber.