There's a saying within the Asperger community: if you've met one person with Asperger's syndrome, you've met one person with Asperger's syndrome ... Within this condition, beneath this label, the variety of personality, of humor, of behavior, is infinite.
When the anger is intense, the person with Asperger's syndrome may be in a 'blind rage' and unable to see the signals indicating that it would be appropriate to stop. Feelings of anger can also be in response in situations where we would expect other emotions. I have noted that sadness may be expressed as anger.
My autism is a very mild form. It was diagnosed at the age of 25, partly because it wasn't diagnosable as a teenager (this is Asperger's syndrome, specifically). But there were certainly traits within that condition, within the autism spectrum in general, especially at the high functioning end, that I think are best looked at as pluses.
Exploring Feelings for Young Children with High-Functioning Autism or Asperger's Disorder: The STAMP Treatment Manual offers practical recommendations and creative practices that will certainly help young children with high functioning autism or Asperger's syndrome overcome their struggles with the really tough issues blocking their positive growth and development. Therapists, educators and parents caring for autistic children who endure a heavy load of anger, distrust, difficult interpersonal relationships, poor self-esteem and self-doubt need this excellent book.