I related a lot to this as a queer, fat, disabled, autistic person. I have long had a pet theory that autistic people get such immediately negative responses from neurotypicals because we fall into their "uncanny valley" of "close—but not close enough—to human", seen as threatening and off-putting like good-but-not-good-enough CGI or humanoid robots. I think there are ways past these sorts of implicit biases, but it will take effort and care, especially from the neurotypical side of things... so it will probably take a while. And in the meantime, I'd rather be otherworldly and vaguely threatening.