So it was, in fact, unironic, sardonic humor. And not ironic self-referential humour. For it to be irony you need to mean something other than what you're saying. Had you been laughing both with AND at it it would have been ironic sardonic humour.

But I'm sure you knew that. You're very smart after all. Your mean behaviour proves that you are highly intelligent, by asserting your higher intellectual status than others.

/\ Can you guess what kind of humour that* is?

*and this