I have no idea if there is a link between autism and vaccines. As far as I know, there may well be a link between autism and the wearing of blue clothes during pregnancy. I don't mean to be flippant, but really, we don't know what causes autism.
What we DO know is that if there is a link, it affects a tiny, tiny minority. MUCH smaller than the minority who die or are permentantly disabled by catching measles.
Right now it is possible to choose not to vaccinate, with the knowledge that the child involved is very unlikely to die/be damaged by measles. This is NOT because measles is not dangerous. It is because the rates of measles infection are low, and thus so is the incidence of complications.
This is because most parents DO have their kids vaccinated, there IS a high degree of herd immunity in the general population and so it is possible to make a choice not to vaccinate and be reasonably confident that nothing bad will happen-measles just isn't around like it used to be.
What I am saying in a nutshell is that IMO parents who are not vaccinating are weighing up the risk of the MMR vs the risk of their kid getting measles, in a population where most others have vaccinated . So they won't take the risk, but are happy to benefit from it. I seriously doubt that people would be worrying about the effects of vaccines if we still had kids dying of measles-and kids DO die of measles.
I vaccinated my kids, knowing their was a tiny risk of complications, because that is, I believe, the socially responsible thing to do. It benefits society and so, ultimately, them.
What really winds me up is that if everyone just vaccinated for a generation or two, measles could probably be virtually wiped out, like smallpox. It would certainly be better if no one had to vaccinate against anything, because the dieseases weren't out there, but that just isn't possible without first a mass vaccination campaign.