C'mon now, we value civility here, and it will get you far. You are being confrontational and not conversational. While obviously this is a personal issue for you, and flag has his opinions and states them tersely, he is a rather knowledgeable person, so I typically think there is a better underlying reason for his opinion. Perhaps even asking him why he said what he said and then diverging from there would be even more helpful. You've made some brash assumptions, and that's understandable, considering on most websites, everyone is just shouting into the cacophony of the void. That doesn't fly well here, and I definitely think that is a good thing. No one thinks you offered a succinct takedown of his comment, but that you responded (probably correctly) to an issue that had nothing to do with said comment.