Interesting post, indeed.
Some people make very poor assumptions. Back when I was about your age, a high school friend and coworker asked me what was "wrong," with my friend Mark. She assumed that he had some sort of mental disability due to the sound of his voice. This really pissed me off because he's a wicked smart dude (and VERY successful now! He has more than a dozen full time employees at his business!) and the reason his voice sounds different is because he's deaf, not because he's "ret*d."
Hell, I'm the one who's ret*d. I wouldn't even learn it for another 12 years after that. FYI "ret*d," was what they called all mentally handicapped/autistic people in the 1950's. Once diagnoses were differentiated and given different names like Autism and Asperger's Syndrome etc "ret*d," became an offensive word to use. It simply means "hindered," or "held back," and is still appropriate to use when talking about "retarding the timing of an engine," in mechanical terms.
Sometimes you just have to bite your tongue (not literally!) and not say anything and just let people be their ignorant selves. Other times you should speak up and say something, like "Um, excuse me? I'm right here. I can hear, think, and speak just fine." or "I earned that grade. My support worker didn't do my assignment/test for me." in order to educate people/shut them up.
I do understand how other parents could think things like "I feel bad for his parents," because let's be honest here.. they do - and they're glad they don't have to raise a child that's more difficult to raise. But it's HIGHLY inappropriate for them to say those things out loud in front of you or your family, and in those instances, if I were you or your family (or me & I was there) I would interject and say something like "Excuse me? Keep your inappropriate comments to yourself!" and embarrass the F out of them for being so incredibly rude. Maybe they'll learn a lesson about keeping their rude mouths shut. Or I might say something like "My control over my body and behaviours is not indicative of my level of intelligence. I couldn't think as slow as you if I tried!" That might really open up their eyes and make them think before they judge someone.
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for supporting trump. Because doing so is deplorable.