As a child I can recall a Downs Syndrome child moving into the area. He was different and strange. We children played in the streets and bombed out sites ( no cars around back then) and I remember running indoors and telling my mother he was 'horrid' My mother immediately told me off and explained that he was that way because of a birth defect and that, there but for the grace of God, goes me or one of mine.
That was always her attitude and it was instilled in me that instead of being nasty, we should all help him be part of the 'gang'
He became a loyal member, was included in games, we teased him the same as we teased each other, laughed with him and not at him and, if others were to bully him then we were the first to start a fight in protecting him.
He died when he was about 13 and we all went to his funeral, we picked wild flowers, which he loved to do and were truly sad that he had passed.
It was a lesson well learned, to accept others that are different. To adapt to helping and including them.
Sadly, although it is better today than it was, any disabled child is not integrated into society, they are often sent to special schools, so, people do not know how to act with them.
Autism is a difficult and complicated illness. There are so many varying degrees of it but, regardless, no human has the right to suggest that they should be locked away or euthanised just because they are different.
How I would like to speak to the writer of that letter, what a cruel and selfish person they must be and if anyone deserves locking away it is them.