I am not blaming autistic people for anything. I have family and friends who are autistic, but, sometimes a narrow group of crimes may be associated with a particular background or mental problems.
We all know that because many jihadist terrorists aare Muslim, but few people think that because many if not most jihadists are muslim, every muslim is or supports these extreme causes. They don't the majority abhor them.
It is the same with a specific fairly rare crime and autism. because those involved in acertain type of crime have been autistic it does not follow that anyone who is autistic is liable to commit that crime.
More pertinently, because the person who committed the atrocity in Plymouth had a mental health problems and research has shown that many people committing this type of crime have also had mental health problems, it does not follow that all mentally ill people are potential massacre perpetrators.