Autism is challenging because it means people do not conform to societal expectations.
I dont recognise this as a uniform definition of Autism. In fact I dont think it is even a helpful definition.
I know people with Aspergers who are totally able to conform to society norms, especially if those norms are very clearly defined and unchanging. So for example I've known people, totally able to function at work or school, so much so you dont even see a problem, even when that work involves public interaction all day every day. However they are completely unable to look for work, interviews are hopeless, cant manage money or a calendar and are knackered utterly at the end of the day.
(They might also have a very set idea of how to make the world a better place in accordance with their needs. It's not selfish because the genuinely are trying to make the world a better place. However when faced with evidence to the contrary, be unable to see why someone might have different and even conflicting needs. This can be very hard for everyone involved)
Society cant uniformally change because not only will you have to deal with the fact that the ASD community does not have uniform needs, but it's not always desirable in many instances.
I know many people with autism will not like the connection between
violence and autism, but I am going to discuss my experiences and that of the people around me. If you dont like it, skip the rest of my post.
As a little DS diagnosed with ASD, he could not communicate at all. It was way easier for him to communicate by biting hitting and pulling hair, it was very effective, very quick and easy way to remove any hassle of trying to communicate. Yes I changed his environment, all his home and nursery caregivers learnt makaton, he used pecs, his bedroom became a low stimulatory environment with specifically chosen stimulatory elements. But he damn well was going to conform to the societal expectation that he did not hurt others. And yes he learnt.
However I know some individuals with autism who cannot and a few who will not (because frankly it is so effective at making their environment and the people in it conform to their sensory and communication needs).
I have seen support groups for children where a certain level of violence was tolerated because "it's Autism they cant conform to society expectations so society needs to change". I many cases this actually parents means the child stops trying, "well it's their autism afterall?"