it's worth pointing out that thimerosal is largely banned in canada, and the canadian government wouldn't let kids under the age of 6 anywhere near the stuff.
generally speaking, you should avoid contact with any sort of mercury for a wide variety of reasons. mercury is highly toxic to humans in any context. it has little to no legitimate use in civilian applications. you should have essentially no contact with mercury at all.
however, this isn't really about vaccines, it's about a chemical that is used to keep bacteria and fungi out of vaccines. that issue should be studied, but the reality is that it already has been, and the issue reduces to questions around proper use of the product. this isn't a concern regarding the safety or efficacy of the vaccine itself.
i would agree with my government's position, which is that it's not worth the risk of mercury exposure. there are other anti-fungal agents to use to protect the vaccines that are less dangerous to human health. the united states should follow canada's lead and eliminate the use of this product in vaccine storage.
democrats should be aware in that taking a kneejerk pro-thimerosal position, you're aligning with multinational chemical conglomerates seeking to maximize profit and not with the science, which is clear that the product is toxic.
that said, the science around the causes of autism has also advanced over the last 30 years. today, we understand that autism is caused by often random genetic mutations in the womb and isn't some kind of disease you can "catch" in childhood. the idea of a cure for autism, which is what i think rfk ultimately wants, is probably impossible, in any post-natal context. we're talking about gene editing at a very early stage of fetal development. the question as to whether environmental toxins in air and water like pollution from factories, including mercury, as well as car exhaust and second hand tobacco and marijuana smoke, may contribute to the genetic mutations causing autism in the wombs of pregnant women would be helpful public policy worth developing and responding to, in the form of increased regulations limiting emissions of harmful toxins in air and water. the trump administration has largely opposed and undone this sort of regulation of industrial emissions.