I want J in mainstream, because he can cope, with support, there. However, because they don't want him there, it's hard. So I could argue that the reason the placement isn't great is because they're disablist and anti-inclusion. But I know that it's only partly that and partly because the very very rare incidents of J lashing out/ taking all his clothes off/ rampaging across the desks/ hurling furniture are very very hard for them to deal with. They feel that some of these incidents are caused by his stress of having to conform in a class of 28 - probably partly true.
The placement isn't great because J has autism, not just because of their attitudes, and if J is still a runner/ climber and violent at 11 I don't see how he'll be able to go to to mainstream because he'd need a secure (locked) environment and a low-stress environment to keep him safe and calm. I can't see how he'd cope with 1000 kids. Not going to mainstream wouldn't be because the world is disablist or because his mother is ignorant about the differences as she's not disabled herself, but because mainstream wouldn't meet his needs.
I also think that, as 2shoes said, kids get much less inclusive as they get older. Yes, they should learn to accept each others' differences, but I don't want J to be their teaching tool and stand there in assembly on National Autism Day being the token 'freak', 'weirdo' or whatever the phrase is for that time. Even full time support (like he has now) couldn't totally protect him from cruelty. And I'd give anything to protect him from that. We can say children should be more accepting and that society should be more accepting, but while they aren't and it isn't, special schools are very very much needed for those who just can't cope. I've seen too many examples of failed mainstream placements and they didn't fail because people wanted them to, but because the child's needs were too extreme.
I'm a secondary teacher and I know how cruel kids can be. They're actually great with a disability they can see, but ASD children I know in mainstream find life very very tough socially. A good autistic school for children with average-good ability is needed here but there isn't one. If there was, and J needed it, I'd jump at it.
Yes, schools need to become more inclusive, but some children will always need a special school.
An education is about more than just exams. Inclusion is about more than just being there and taking part.
I think Fio said it best when she said a blanket policy will never work. The whole spirit of the DDA and SENDA was about offering what each person needs, not just having the same thing for everyone. So getting rid of special schools wouldn't be a reasonable adjustment in itself and would, imo, be very very bad for the minority of children who need somewhere different.