Why are autistic adults rude?

Why are neurotypical adults rude?

Not all Autistic people are rude, to suggest otherwise is prejudice - often Autistic people are more polite than neurotypical people because they've had social skills training and are more sensitive to social rules than neurotypical people because they have to be in order to pass as neurotypical. Autistic people don't always understand social rules, such as being polite rather than being blunt or honest, this can sometimes come across as rude.