I always thought their support of Queer and Neurodivergence felt fake or forced, like they were just using us so they could talk more about antisemitism, or so they could seem more respectable. So it doesn’t surprise me that they’d attack someone neurodivergent or queer if they think they could spin it as just another antisemite.
They don’t actually care about us, they’re just pretending to care so they can talk about what they want and seem like the good guys.
The difference is that Something like Retarded is used by someone else, someone who isn’t like that person. It was a clinical term used by clinical people who would never know and could never know the feeling. That is to say it wasn’t great to begin with. People who were “retarded” weren’t embracing that for what they were, it was imposed upon them by medical professionals who don’t really understand them as people (many were studying them like specimens). It was primed for derogatory use.
Neurodivergent on the other hand is a term embraced by the community, it’s used as a self-identifier. It doesn’t have the same oppressive connotations the others did. To turn it into a slur would be like turning transgender into a slur. It won’t work because the group identifies as that, and will keep using it.