You said "I understand that people want higher taxes on the rich. I think it's stupid, but I'm not going to argue about it." This is not a question, it's a statement, and a provocative one at that. Saying you're not going to argue about it is not going to stop discussion on exactly that point.

You also said "His real argument is probably too snooty of an argument to make in print, but something tells me that's what he's really getting at. I wished he'd have just come out with it, though. It would have been a lot more honest."

This strongly implies that the author (Buffett) is dishonest in his arguments. I'd say that's calling him out.