We Are Like Your Child is a group of autistic and/or disabled adults who talk about their experiences so that they can build solutions to issues. They have a Neurodiversity bent, and do not see being disabled and being happy as mutually exclusive.
This particular post is kid of a walk through of the different things that might cause aggressive behavior for some autistics. By going through the list, it can help you think about reasons you or someone you have in your life MIGHT be acting aggressively.