I think it's pretty hasty to say it's ridiculous. It's pretty common to use the word "ableism" in Autistic self-advocacy circles and to say that Autism is a disability without being a disease. (This is all standard "social model of disability" stuff that way predates the Autism self-advocacy movement.)

I don't really want to go out of my way to flesh this out further because just googling around and reading Wikipedia articles will be way better than whatever else I say in a few sentences, but suffice it to say, if people can discriminate against Autistic people for being who they are, what should we call that? I'm partial to "neurotypicalism" but that's not the common term. Ableism is much more common.

Anyway, please Google the social model of disability.