There is substantially more going on than "tolerance vs intolerance". We have a huge influx not just because of changing diagnosis standards, but also because the financial benefit for getting a diagnosis has also expanded.
The views of people you are trying to label as fascist are more accurately described as individualism vs welfare state.
I can second the assertion. It's absurd that people really believe folks are getting benefits from having a mental disorder. It's literally the "welfare queen" nonsense just directed at a new group.
You don't even get social benefits, no one excuses your behavior just because it has a label. You get told it's your fault for not managing your disorder properly. Have you seen how we treat people with visible, obvious, undeniable disabilities? Like shit.
Ayn Rand has a lot of friends here. She also described the neurodivergent as "subnormal" and thought that society should do nothing to help them or the handicapped. Additionally, she believed that "normal" children shouldn't have to ever interact with those who were mentally different as it would harm the "normal" children.
Depending on the specific services in an area: everything from subsidised legal access to medications, to access to accommodations in schools seen as favorable (private environments to take tests, or extended deadlines).
Some areas have specific assistance to parents of children with a diagnosis. Some have easier access to disability support services and payments.
Turns out that the poorer a nation is, the less reported autism they have. That could be because there is no benefit to the diagnosis or it could be because they have less healthcare in general and a real diagnosis can easily take 4-8 hours of clinical time.
Or it could be because poorer countries actually have lower rates of autism. I'm not claiming that's the case, just that we don't have any reliable data on it one way or the other.
The views of people you are trying to label as fascist are more accurately described as individualism vs welfare state.