No one is trying to stifle anyone else.
I think some of what you're saying is open to misinterpretation so Doodlebug. You did seem to be saying upthread that there was only one correct way to describe an autistic person, and to condemn the use of 'has autism' instead.
I suspect that most people here didn't study the English language, they just use it, without having any idea of what they're doing, or why they're doing it.
Again here, I'm curious - are you including yourself in that cohort? Or are you saying that you're getting it right (because you have thought about the language you're using) while many others here are getting it wrong?
Maybe I'm just misunderstanding what you're saying, I'm not sure.
Autistic people have the right to shape/campaign/insist about language that refers to them.
Yes, of course OnTheHillNotOverIt, but they don't have the right to speak for all autistic people without consulting either them or, in many cases, their families who represent them.