My brother had some memorably violent episodes. Of course, according to the experts that had nothing to do with his being autistic and being violently opposed to any kinds of changes in his environment (like changing the sheets on his bed.)
Yep. I knew a "high-functioning" Asperger's sufferer for a long time. One time we agreed to share a house at the beach. I arrived first and set up a fan at one of the windows. When he arrived from his home bringing an absolutely identical fan, he went to the one I had already set up, examined it in minute detail, took it down and put his identical fan up in the same position, and looked at my brand-new fan as if it were smeared with feces.
That's just one of thousands of exasperating moments over the twenty years we were friends that generated rage-filled tension.