I read this as "people who aren't ( (clownsuit enjoyers) and (autistic) ) ...", but it looks like others have read it as "people who aren't (clownsuit enjoyers) and aren't (autistic)" = "people who aren't ( (clownsuit enjoyers) or (autistic) )", which might be the stricter literal reading. Would you care to clarify which you meant?

Peter Thiel is, well, autistic. Or at least has some tendencies in that direction (he's unlikely to be clinically autistic, with the possible exception of mild aspergers).