That is true, it's not the nicest way to leave, certainly not how I would. But we all know "no nonsense" people who behave this way. All I'm trying to say is there's no definite reason as to why he got up and left.
OP should humble himself because A. It's not really that big of a deal, it's an opinion....about a dead language B. it's kind of an expected response in this industry. He also says himself that he doesn't even know if he asked what his favorite language was.