This is terrible of course and there were plenty of incidents in the UK too, secret filming of abuse in locked institutions that were modern equivalents of the old Victorian asylums.
https://www.youtube.com/watch?v=Qy3qg32hKFc
The UK has autistic people locked up for decades for no crime while at the same time promoting autism acceptance month.
The problem is profound autism, or even mid level autism sometimes, it is extremely resource hungry, your dealing with people who need 24/7 care, unlike those with dementia that tend to be old, slow and weak those with profound autism can be young, strong, aggressive, destructive , incapable of following instructions at times.
I`m not sure what the answer is apart from treatment / cure to make these people more functional allowing them more body autonomy.
If autism is going up how will countries cope with hundreds of thousands / millions of people like this in the future. Probably drugging them into submission, maybe strapping them to some AI headset so they can disappear into their own world like the Matrix movie & require minimal resources to look after them.
Without some kind of treatment breakthrough i believe the future will be dark for many of the more severely impacted autistics among us.
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"The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends upon the unreasonable man."
- George Bernie Shaw