nothing to do with ASD. my DD is severely autistic and even she has better manners
ridiculous to suggest that ASD causes your rudeness
ASD can cause social and comunication issues unsure what the dx criteria is these days but you used to have to have significant s & c problems to even get an assesment last time I had cause to utilise that process. manors and the way you talk to people are in essence social and communication things, it is not a stretch to understand that people with ASD may come across as different socially or when they comunicate.
People without issues in genral like things to follow patterns we call them good manors and do not tend to like things that deveate from our traditionally accepted way,they call that rudeness. So yes ASD can in many cases be a reason for rudeness.
op one of my kids (on the surface he appears to be the one least effected by ASD but in reality he has more subtle issues that can cause huge huge problems) has fairly recently started attempting to wear real clothes he previously lived in onesies, the clothing he can cope with is hard to find because we have to be very careful with fabrics and seams, his taste favours something called steam punk.
I'm not a very fashion aware type person and I struggle with working out what look is what but for his birthday I worked very hard trying to find lots of stuff he would like,I went a bit crazy amount wise because I was trying to get him enough to replace his entire wardrobe, and I paid one of his carers and their same aged child to come shopping with me so the kid could help me find stuff for him that was the look he wanted and would be trendy in those circles. To do so I had to take 2 days off work sort out carers to look after the other children and have the little ones with an overnight nanny, it was a fair bit of faff but we got a really healthy amount and I was very pleased with my efforts and couldn't wait for him to open them and be pleased. [epic fail at the point that I hoped this]
So his birthday arrives he opens everything most of the items get blank face no response at all (this is normal) one item gets "that is ugly,I will not use it,what is its purpose,why would you think I would want that" and then he says "where is the book, you haven't got the book,you are meant to get the book" he became quite agitated all whilst I'm sat their thinking RUDE RUDE RUDE and what the fuck is the book, what book.
It turns out he was expecting a picture book because he has had one every year for as long as he can remember and he thought getting a picture book was in the rules.
On the upside it is now not unusual to see him sat in his room wearing a very strange combo of top hat,skeleton bones Tshirt,cargo trousers and a cane.
He also now has card prompts that he can use to try and stop his instant really fucking rude response in plesant giving situations. Oddly one of them says "do not leave the gift behind"