He may have assumed that at some point someone in the hiring pipeline would _not_ be an idiot (or in your words, "would be autistic") and may notice his false claim. Especially for a college student applying for an internship, it's a little much to expect him to know exactly where lying on your resume is appropriate. (At some point he said "I have experience in Linux and UNIX" and the moron on the other end still referred to his resume saying Unix-like).
I think you may be extrapolating your own experience of "not being autistic" (by your definition) a little too widely.
I think it's silly and demeaning to think of college students as being that naive. I was one very recently and believe it or not we aren't that way. Especially ones who study engineering at top schools like CMU.
Everyday I talk to someone who isn't informed about one subject or another. It should be a common skill for people to put their selves in the other person's shoes and explain it at their level. When a non-cs person asks me about what exactly my job is I don't start going into details about Hadoop and Spark etc, I talk at a level they could understand about data.
As far as the autism comment, it was a little offensive but I meant it in terms of ability to read the social situation, not cs knowledge.
I may be a little harsh here, because everyone makes mistakes, especially in college. And there is nothing wrong with that. I've done embarrassing things with recruiters too, believe me. I just want to make sure people realize it's a mistake and learn from it.
I think you may be extrapolating your own experience of "not being autistic" (by your definition) a little too widely.