Autism is a neurological disorder. It's not caused by bad parenting. It's caused by you know abnormal development in the brain. The emotional circuits in the brain are abnormal. And there also are differences in the white matter which is the brain's computer cables that hook up the different brain departments.
Of all liars the most arrogant are biographers: those who would have us believe having surveyed a few boxes full of letters diaries bank statements and photographs that they can play at the recording angel and tell the whole truth about another human life.