I agree that there are problems that come about when people are used to interacting with NTs, and then try to apply those rules to other autistic people.
Actually, though, I have met a lot of autistic people, and what I've seen... is the potential for a lot of better communication and better relationships. But there's also the potential for a whole lot of other things.
I live in a building with (coincidentally in two, deliberately in one) three other auties. I am good friends with one and very glad to live near her. Another one, I just don't have a lot in common with. Another one, is overloading to me (but not particularly annoying, just very exhausting and very words-words-words in communication style).
Among auties I get along with some, don't get along with others. There is definitely a potential for good stuff -- very good stuff, I think all autistic people need at least exposure to other autsitic people -- but autistic people are also prone to most the screwed-up stuff non-autistic people are prone to and some other screwed-up stuff of our own and that stuff happens as well.
I like the idea of having a lot of exposure to autistic people, I don't know that I'd live in an all-autistic town or island. The lot of exposure, means more chance of meeting some of the ones I really click with, but of course clicking like that is not going to happen with everyone.
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams