I find it really depends on the person. Some liberals don't like some autistic people because we speak what's on our minds and that can be un-PC and come off as insensitive. On the other hand some conservatives think we are weirdos.
I think people with less conservative personalities tend to like autistic people more, but that doesn't necessarily predict a person's politics. A lot of people with conservative and conventional personalities are politically liberal and a lot of people with unconventional personalities are politically conservative.