I've just read through these messsages since I last posted. I can see feelings run deep.
I totally understand why you'd drop old NT friends after they have hurt you time and time again. I suppose you've tried to explain ( since they are old friends) but they just haven't taken it on board, continute to ignore your child or make their tactless comments, so yes, you get angry and then you move on.
I also see why you'd get to a stage of not bothering to explain things to every NT parent you first encounter. You form a first impression, feel the learning curve is too steep for them, and your time is too valuable to waste on them. I mean we all do that a bit. We pick and choose who we're going to engage with, especially other parents.
But what about NT parents who seem more OK? I can't believe that you really think all the new NT parents you meet have the same level of ignorance and intolerance or whatever. And some of those NT parents have direct experience of SEN adults and children. Take Rhubarb, for example. She has an NT child yet she told us she has a downs syndrome brother. Take me - I had a father with mental illness. Take someone else who works as a special needs support assistant at the local school.
I just find it sad if you don't ever put out feelers. What happens if your SEN child starts playing with some NT children at a local playground, not for a minute but say for half an hour? Or when you son starts school, jimjams, what happens if he gets friendly with an NT child? That friendship between the children, the fact they are in the same playground, live in the same area, go to the same school etc, doesn't that give you some common ground with the NT parent?
Would you not think about approaching the parents in a friendly way, striking up a conversation, seeing if there's a friendship in the making? talking to them about your child's condition? giving them some allowance for saying the wrong things to you, as long as they also said some right things too?