Let's say you're talking about social justice with someone of an oppressed class (and, for sake of argument, in that particular arena you have privilege). They're saying things you don't want to hear, uncomfortable things that hurt your feelings or make you feel bad. And let's say this person is saying what they mean, rather than sugarcoating it or apologizing.
You turn to the guaranteed conversation stopper: Argument from Tone. "You don't have to say it that way!"
Yes. Yes I do.
It's incredibly arrogant to dictate to someone how they say say things. Most of what gets brought up in these sort of discussions is difficult, it's real and it is raw. And we get told by privileged people all the time that what we have to say does not count because we are not them.
In autism discussions, this already huge problem is worse. Not only is it privilege abuse, but to tell people who are often neurologically incapable of tact and sugar coating that they have to say something 'nicely' or you won't listen to them, that is why it's so obvious that many allistic people want disabled children to talk and disabled adults to shut up.
It is utter ableist crap to say "talk like an allistic, and then we might listen to you." See, we can't talk like allistics. We have a disability that involves social and language differences! Can no one see the problem with demanding that people who tend to have language problems and social differences carefully phrase their language (which can be a battle to put together in the first place) with feelings in mind more than content?
Tone doesn't change what people are saying or why they are saying it. Those extra words, that padding, isn't going to change truth, it's just going to make privileged people feel less guilty. It isn't always about the comfort of privileged people, and it's never about feelings.
If someone is engaging with you about these issues, they probably think you have potential. Then if you pull argument from tone (by the way, it only seems to run one way. If I tell you that what you do is hurtful, no one gives 2 shits), well, there's more of our time wasted. And if you are going to insist it's my responsibility to educate you about autistic culture, don't fucking dare bringing my 'tone' into it.
In fact, just leave tone out of it altogether. Listen for content, not warm fuzzies.