[private]
[... Is Kakashi actually concerned that he might have offended Sasuke?
Kakashi is never worried about that. The entirety of their interaction involves either A) Kakashi lecturing Sasuke about how, in some way or another, he is Doing It Wrong and is therefore a disappointment, or B) Kakashi mocking him in a way that it almost seems like he isn't trying to mock Sasuke, but he is, that asshole. Kakashi loves mocking Sasuke. He has made it into a goddamn art form.
But this isn't that Kakashi. This is a different Kakashi. One that doesn't know Sasuke very well at all. A younger Kakashi, maybe one who thinks of Sasuke as his equal, who feels he should be polite to him.
It's annoying. Sasuke doesn't care if people are rude to him or not. And Kakashi being polite is just - wrong.]