So many times this has happened to me as well. I'm so ugly the assume I'm an autistic retard.
When I was 11 the school tried putting me in this class with retards for literally no fucking reason. I had above average grades n everything so there was no reason.
Also when I was SIXTEEN, this supply teacher was treating me weirdly and like I had autism. I asked him for help on a question and... he... was... talking... like... this... Saying everything slowly and pausing after each word cuz he thought I was a retard. Then when he finished helping me he tried to niggering fistbump me. He's not the type of person to do that he was doing it cuz he thought I'd like it cuz I have down syndrome apparently.
It was fucking humiliating and it's a fucked up thing to have to happen to someone