Let me tell you why this AUTISTIC girl did this:

They have very black and white thinking

They copy what they see - they do not forget what they have seen and they do not have the same internal "reasoning" or "filter" others have as to whether this is something people actually do

They can have poor judgment as to what is and is not an extreme, unsafe, or abnormal action - hence the strong issues they have with social skills

They lack empathy for the feelings of others, do not think within the same constructs we do as far as how something impacts others - they can "care" and "feel", but they are clueless about the way others "think" about things - lack of a strong ability for empathizing with what their fellow man goes through, what matters to others, the needs of others, etc. This does not mean that they cannot be kind or affectionate with people but there is a mental limitation.

None of these statements fully describe any one person as autism is a big umbrella with many people under it and each one has their own challenges, strengths, limitations, and special skills, too. Some are much worse off than others.

They can almost seem to have antisocial or narcissistic leanings, but it is all neurological and not really true antisocial or narcissistic disorder.