your question it's valid, but when you neglect the situation like, to not ask how this guy is, if it's everything alright, etc... at least for me it's kind of sadistict y'know, but I'll tell that yes, unfortunately autism disturbs to make up social interactions, that is the most dificulty that autistic people suffer along in their lifes and it's better accepting it rather than negating it, it's reality, neurotypicals often segregate those whom they find strange or different.