The fact that you seem to interchange autism and vegetative state shows your ignorance.
I feel nothing but pity for you. There is no question that you are unable to deal with the autism of your family member (or perhaps a los of a different family member ch”v?) and are desperate to find a place to put blame and anger. I have never witnessed such intense denial from someone who is not psychotic except in someone protecting themselves from unbearable amounts of pain. And it only points to your level of pain and need to shield yourself from reality. NOBODY who is honest would ignore the facts like you do, or scream and shout insults at full volume at everyone with a differing opinion.
I am truly sorry for your pain. I am truly sorry for the way you have chosen not to face it head on. I am truly sorry that you cannot have a genuine conversation with people on this topic. May Hashem bentch you with a yeshua.