Autism

I was following a Twitter feed where autism was being discussed and an autistic person decried the term 'person with autism', maintaining it stigmatised them, which I found rather confusing.

On looking up the difference between 'autistic person' and 'person with autism', the majority of autistic people, but by no means all, say that autism is something that defines them, like skin colour, gender or sexuality and isn't something that's transient and thus they prefer the identity to come first. It's called Identity First Language. For example, we talk of Asian people, not people with Asianity, or black people, rather than people with blackness. 

One area where this is reversed is the term 'people of colour' being preferred over 'coloured people'. Another is Downs syndrome - we speak of people with Downs and not Downs people, despite Downs being permanent and the defining attribute.

Can't see any problem with calling people by whatever term they want to be called but, given the fact it's not homogenous, it's fraught with logical traps that you don't know you're walking into until someone accuses you of using an inappropriate term.

As for not using Identity First Language being stigmatising, I simple can't see the connection.