The thing about being autistic is that unless you are a severe case, you don't necessarily walk around with a badge that says "Hi, I'm autistic". In most cases, you will just look either rude, weird or otherwise.
I make it a point to disclose my autism whenever I am wary of doing some weird shyt from time to time, but generally what I have done as an individual - and what I feel others should encourage in autistic people who struggle with socializing - is work on it. If it is clear that one is trying, then obviously one should be encouraged and respected a hell of a lot. It is not easy to read social cues when it is not as innate in you as it is in others. Most of the time, autistic people are actually more pleasant than given credit for, having met other people with the condition. So IMO, awkwardness doesn't equate to rudeness in that case, and it is likely that one wouldn't elicit ridicule or disrespect for simple awkwardness.
For one, if someone doesn't understand particular social cues like body language or spatial awareness, but is otherwise noticeably well-meaning and polite verbally, it can be mitigated.
Can you give an example of a situation with body language you might not get?
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