In order to disprove a link, there must first be proof of a link. Where is that proof?

For me, this is the phenomena of parents reporting a change in their child's behavior after receiving shots as toddlers. I think this is enough of a question mark that scientists should at least delve into the subject more deeply.

It isn't. But Anti vaxxers aren't questioning science. They're refusing to accept science.

I can't speak for you and your experience with anti-vaxxers, but for me. I don't actually know any in real life. I have many friends and family, who like me, have a lot of questions and doubts about vaccine safety, but at the end of the day their kids get vaccinated. I don't think true anti-vaxxers are all that common.