I would suspect that if it's in the court system, there is what one side claims to be evidence, which is different from proof.
I personally would not like my children to be around vaccinated children, as they will be exposed to whatever was in the vaccine.
I do think that you genuinely believe what you're saying. My beliefs have changed a lot over the years and I've found the opposite of many things I used to believe to be true. It's all about belief systems, which is why there's no point in prolonged arguments.