Autistic boy assaulted by waitress

Here's the story as told by the child's father:

We had to wait about 15 min. to order, and the waitress seemed stressed. It was David's turn to order... he was slow to make up his mind while ordering, and grumpy. Not yelling or anything himself, just cranky and repetitive (about not wanting ranchero sauce on his omelet, said 4-5 times). The waitress took this somewhat uncouth behavior as directed at her, and she suddenly snapped. She grabbed his shoulder, shook him, and leaned over and started mocking him, yelling his words back directly in his ear. He asked her to stop, and she grabbed his shoulder and then started screaming in his ear. Screaming that she had had enough and didn't have to work with this. And then she let go, stood up, told the table that she would not serve anyone at the table, and stalked away. He hadn't touched her beforehand... he wasn't even making eye contact, he had been looking at the menu.

We all looked at each other, in shock. After a pause, I got up and went to the manager, behind the register. I politely explained that I had an autistic son, that sometimes he needed a bit of extra time or patence, and did not read body language well. And that his waitress had abused him and refused to serve our table, and that that was unacceptable. I wanted an apology and a different server. But the manager backed up the waitress. He said that she was right, and that if my son was "going to be too much trouble" then we should not let him order for himself in restaurants. That it was our fault for having a child that needed patience or hesitated while ordering, and so we should have ordered for him. And that our party should leave.

Link via Ballastexistenz