Dude the symptoms of autism set in at the same age and always have. That age just happens to be at the same time as the schedule for a round of vaccinations.
Weren't you here preaching correlation and causation earlier when if fit your narrative?
FWIW, my parents were total slackasses and all my childhood vaccines were late as hell if at all. Meanwhile my autism severity scores are right at the extreme edge of the ranges reported among people who are capable of functioning without a full time handler. My symptoms all set in at the normal ages. It has to do with the development of the brain as we grow.
Also, I happen to love being autistic. Normies are fucking weird and boring as hell. I'd never give it up.