For people with autism, the Earth feels like the right planet, but they have been somehow transported to an alternate universe version of it.
On Earth, crowds represent safety and belonging. The more people that neurotypical Earthings (non-autistics) can keep around them for the longest amount of time, the more secure they feel.
For the autistic or person with Asperger’s syndrome, crowds are threatening and dangerous. They can be a source of stress and discomfort.
The average NT likes loud music, bright lights and uncomfortable clothes are fine if they bring admiration and social acceptance.
For the autistic person, these things can cause a very real, physical pain.
In a conversation, a non-autistic person will typically lean in, make eye contact and ask personal questions.
An autistic person sees this as an invasion of privacy.
Like the Bizarro character from the Superman comic books, for the autistic person, wrong is right, mean is nice and honesty not always the best policy (especially where the appearance and fit of clothing are concerned).
So like poor, misunderstood Bizarro, autistic people are mistakenly seen as being, deceitful, cold and uncaring. Yet they are doing what feels right to them and they assume that others feel the same way.
An attempt to be polite is seen as being rude.
If Superman went to Bizarro’s home planet and knelt down to pet a dog, he would be a criminal. If Bizarro kicked the dog, he would be a hero.
It is a mistake to assume that a person with autism is deliberately being rude because they don’t feel empathy or care about other people. They do care and often have an overabundance of empathy.
To Earthlings, they would seem very warm, open and kind, if they were seen at home on their own “planet”.
It's a pretty place. It looks like Earth, only quieter.