As a woman with autism myself and also as a retired nurse for people with learning disabilities I have a reasonable amount of experience in this area.
To start with it presents very differently within males and females.
Females tend to mask more. I believe this is because as girls we are conditioned from birth to be nice, be kind, fit in in a way which is far beyond expectations on boys but maybe it is in part hormonal with testosterone making boys inherently more aggressive.
Then there is also the fact that you can be an arsehole with autism or a nice person with autism.
The lack of empathy is a stereotype which does not apply to every autistic person at all.
Difficulty in coping with social relationships and understanding the motivations and behaviour of others is not the same as lack of empathy.
Many autistic people make exhaustive efforts to be the person they think others want them to be in order to make other people comfortable.
Those who don’t (mainly males) are the ones whose behaviour leads to the negative stereotype of autistic people as cold and selfish.
However, even within that group those who would then progress such behaviour as far as coercion and violence it is not specifically part of autism.
Autistic people do have characters and personality separate to their autism.
Learning disabilities (and to be clear I am talking about people who here about people who could not live independently, are non verbal etc) are a different kettle of fish and what we as learning disability nurses termed “challenging behaviour” ie aggression is quite common with people who have autism and a severe learning disability.
But these individuals have the double difficulty of struggling with the world due to autism and limited ability to express that or to develop coping strategies due to their cognitive disability so it is very understandable that aggression is often the outcome.
I do think that self diagnosis of both autism and ADHD is a problem.
It is bizarre and frustrating that some people see Autism (and ADHD) as desirable labels to make themself interesting, or to get special treatment or (sometimes literally) a get out of jail free card.
Apart from anything else it gives the rest of us autistic people, who are just living our lives and not expecting the world to revolve around them, a bad name.
I actually feel awkward if I need to tell someone I have autism due to all the bandwagon jumpers.
Even if you have a professional diagnosis it is not the free pass for life which some seem to believe but rather a signpost to help you understand why you struggle and how to make life work for you but never of course, at the detriment of others.