No, you are wrong. People who haven’t vaccinated are not from any certain political party.
Is there some reason you WANT to believe what you say?
When a large percentage of mothers in California believe the rantings of some idiot celebrity over the advice of professional medical providers, I would venture to guess that they are of a liberal persuasion rather than conservative. I could be wrong, but after 12 years in that state, it's clear which party produces moronic parents.