My younger daughter has autism. No one ever believed it - even her year 6 teacher said to me "I don't believe she is autistic" despite her ehc plan and CAMHS letter of diagnosis.
People tend not to understand autism in girls. They often try to mask and it can come across as rude - they don't get it quite right and they are blunt, don't understand social cues, interrupt, don't understand social hierarchies, can't always see someone else's perspective...
My daughter got it wrong over and over. A mother of a girl in her class said to me that her daughter told her that they all understood that she said and did odd things but that she didn't mean anything by it.
But one girl in particular, who was the class queen bee, had a new sibling and was attention seeking and kept making out to her mother that my daughter was bullying her.
And the mother, who was the queen bee of all the mums turned some of the other mothers against both of us.
I hadn't realised until I went on a mum's night out and 5 mothers completely ignored me - I was sitting next to one and across from another, so it was awful.
I spoke to school. They assured me that my daughter was not bullying this girl. But the other mothers got nasty. One shouted at my daughter in the playground. Another phoned me up and ranted down the phone to me.
By this time the head was involved. She was furious with these mothers, had spoken to them, but they would not stop and there was only do much she could do.
Other girls and their parents were scared of upsetting the queen bee and her friends and my daughter wasnt invited to several parties, which all the other girls were invited to.
I was almost having a breakdown over it. In fact, a few months later, I saw the queen bee mum in the street and I had a full blown panic attack where I couldn't breathe. It is the only time it has ever happened to me.
My daughter went to a sen secondary school and I never had to see these parents again.
What i would say is:
I believe you
It gets easier after primary school where parents aren't so involved
Concentrate on the nice parents and ignore the clique