As someone on the autism spectrum, I don’t mind using it or hearing people use it at all, as long as it’s being used as a synonym for “dumb” and not being used to specifically disparage someone with a disability. Just like “idiot”, words evolve over time from being specific words to refer to disabilities to just general words for someone being a dumbass.
“Cognitive dissonance is an uncomfortable feeling caused by holding two conflicting ideas simultaneously”