Two points:
First, given that property taxes are pretty much mandatory and once you’ve paid them you’ve already financed your child’s early education, it’s coercive to then require vaccinations for public school. I don’t disagree that every child should be vaccinated (barring certain health conditions I suppose), but until very recently we managed to accomplish a very high vaccination rate in non-coercive ways (public education, doctors’ recommendations, etc.) Now if vouchers are freely available so one can leave the public schools without suffering a relatively severe financial penalty, that’s a different story. For example, I would have no problem with a private school establishing a policy of mandatory vaccination. That’s a private matter, not a government one.
Second, doctors do view autism as a form of mental illness. He could have been more specific, or at least spoke with more sensitivity, but it’s quite likely that they’ll eventually learn that certain combinations of vaccines do trigger neurological illnesses, including mental ones, in some children. Someone linked to a remarkable admission by a researcher in one of these vaccine threads in which he admitted that they left out the information learned from a study that MMR vaccines have been found to trigger autism in black children, for example. All of the stories that parents have of raising perfectly normal children until just a few days or weeks after vaccination are going to be found to have some scientific justification eventually, in my opinion.
Coercive is subjective. Requiring basic health and safety standards for a public school isn't coercive if they're backed by evidence. If your child isn't vaccinated, they're at risk of starting an outbreak. The lessons of the measles outbreak this year that has spread to 14 states should be clear. Anti-vaccination advocates are a threat to public health.
You don't want to vaccinate your kids? Fine, keep them home and out of public places. And you're going to still pay property taxes too, so too bad. We don't (or shouldn't) base public policy on hysteria or irrational fears.
Second, this is 2015, 17 years after the original fraudulent claims of Wakefield between autism and vaccines. There is simply no excuse for you to be this ignorant, and to be parroting completely debunked claims. Everything you said in your paragraph is wrong, and based on faulty, unproven conjecture and thoroughly disproven fraud.
"I heard from a guy" anecdotes, hearsay, psychic predictions about future findings, and clairvoyance are not evidence.
It doesn't matter what your opinion is about what we'll find. Your opinion has isn't based on any evidence in the real world.